The Lessons of the Brain
JACOB'S ARRIVAL
(This article is taken from a soon-to-be-published Paulist Press
book. All Rights reserved)
>Jacob, our third child, was delivered by Caesarian Section. The doctors
allowed me to be next to my wife, Linda, to witness the delivery. The memories
are still sharp years later. I remember the fear and attraction as the
surgeon made the first cuts into Linda -- who was wide awake! I recall
the smells and sounds of the place and even recall the doctors talking
about their financial investments and families as they opened her up. In
spite of the specific and clear recollections of the birth, it still remains
an overwhelming yet muddy memory for me and I can't totally comprehend
what it was like for her. Then, seeing this little person lifted out of
my partner had the effect of putting other events into a perspective that
made them seem trivial. Jacob's birth was at that moment the most vivid
and yet unreal experience of my life. My mind still does not have it fully
integrated into the assumptions I make about living. And when I try to
appreciate the sensation and shock that Jacob's system was enduring, I
can only wonder. Did he feel it all? Was he aware of the significance of
this passage? Was he aware of anything at all? Did it hurt? Did he make
any sense of the information that flooded his senses? Will he remember
any of it? The difference between what was happening to Linda and me in
that moment of birth and what was happening to Jacob is immense. There
is a great gulf between a human who has a history and the human who has
but the urge to make one. For his first history making experience, Jacob
was thrust across the gulf into separate humanity. His Pilgrimage had begun.
The pilgrimage that begins at birth is to a large degree a journey made
possible by the brain and by the brain's systems as they are immersed into
a family and culture. What could knowledge of those systems tell us about
how to nurture pilgrims? Might knowledge of the brain inform us in religious
education? Could it tell us something about the religious educator's agenda
and methods? Like a good gardener learning to care for a plant by learning
botany, wouldn't we be wise to let cognitive science inform us? For the
next few pages, I want to explore just that. I want to propose that the
central nervous system can teach us a thing or two. And in the process,
I hope you will be able to celebrate what I have come to think of as the
central miracle of human being: that we can come to know, to grasp meaning,
to be aware, to develop a faith and to project futures that take shape
first in the concert of chemicals, synapses and systems of the tissues
of the brain.
LESSON NUMBER ONE: THE NEW BRAIN HAS A FULL AGENDA
The moment of birth is more like the graduation of a student than a cold
start of an engine. The day of our birth marks that moment of separation
from the matrix upon which we first take shape. The months of development
before birth are full of landmark events; not the least of which have to
do with the development of nerve tissue. It is testimony to the importance
of the brain to our total system that the greater amount of oxygen and
food supplied to the fetus is directed to the formation of nerve tissue.
The nearly nine months of development we human beings go through in mother
might best be described as nine months of neurological development that
just happens to be accompanied by the development of the rest of the body
and its systems. 1
Consider this: in just 18 days after conception, the first neural cells
appear, marking the rapid and intricate development of the brain. The brain
and spinal cord change from hints of a nervous system to a sort of stalk
with a bulb at one end. Within weeks it achieves the shape and segmentation
that we are familiar with. By the time the baby arrives, the brain and
it's related sensors have been at work for weeks. The genetic plan has
already "etched" into the circuitry of the infant brain programs that make
the baby human able to take on and take in the world that buzzes around
it.
Mammals come in two varieties: cocial and precocial. Cocial mammals are
the ones that are mostly complete at birth. Thus, animals like the horse
or cow are able to find their "land legs" within hours after leaving their
amniotic "ocean." They begin to explore their worlds within a day or two.
Precocial mammals, on the other hand, are those mammals who, when born,
cannot thrive without the nearly constant attention of the mother and/or
father. Precocials still have a good bit of development and growth that
must take place before they are "complete." 2 Humans are precocial. We
are born with an incomplete respiratory system, skeletal system, muscular
system, digestive system, and most importantly with a partially developed
nervous system. For us, mother/father will continue to be our matrix for
at least two years.
In those two years, the brain makes huge strides toward completion. Thise
strides include 1) the multiplying of connections from one brain cell to
another (the web of connectors between nerve cells called dendrites) as
learning and stimulation happens; 2) the completion of the bundles of nerves
that connect the left and right cortex; 3) the full insulation of the billions
of neurons with tissue called myelin; 4) the development of cells and cell
connections in the frontal lobes that, when completed, allows the person
to make plans, remember instructions and restrain what he or she learns
is inappropriate behavior.3
Yes, horses do get their acts together faster than do we, but our acts
are considerably more complex and a larger part of our behavior has to
be learned. Still, we are born with a few tricks tucked away in the synapses
of our brains. When Jacob arrived, many of his programs showed themselves
right away. His arms flew out when he was turned (the"moro reflex" that
restores balance), he was able to hold a finger (the grasping reflex),
he pushed his head against Linda's neck when his face was caressed (the
rooting reflex), he sneezed when the doctor shined a light into his closed
eyes (sneezing reflex), and his mouth greeted the world with the sucking
response.4
Many of these inborn programs insure the child's safety. For example, infants
are born with is the ability to recognize a "cliff edge" (like the edge
of a bed or table) and avoid the drop-off even if they have never before
experienced a dangerous "cliff." The presence of this "hard-wired" depth
perception has been demonstrated in experiments where babies were placed
on a half transparent, half opaque table. The babies could not venture
onto the transparent part that seemed to be the edge of the table even
when coaxed by their mothers. The babies innately perceived the "cliff"
and reacted to it as if were a danger.5
Other inborn programs aid vision. They are the strategies of scanning and
pursuit. Seeing anything is a complex process. There are numerous points
at which the process can be interrupted including the very pointing of
the eyes at an object of interest. There are three actions that the muscles
of the eyes have to perform if there is to be seeing: rapid or jerking
movements (saccades) from shape to shape, the smooth pursuit motion after
a shape is attended to, and the rapid, minute tremor that keeps the image
from going "stale" on a particular part of the retina (it seems that if
an image continues to fall on exactly the same cells of the retina, the
cells would become desensitized and the image would fade). The saccade
motion is the search strategy that allows the baby to scan the world for
shapes, shades and for things of interest and meaning. The pursuit or "locking
on" ability makes it possible for the baby to watch long enough to satisfy
her interest.6
We are also born with programs that aid social interaction. Many researchers
believe we are born with a program that leads a baby to look for and "recognize"
a face. With the aid of eye tracking equipment, researchers are able to
trace the movement of a baby's eyes as it scans pictures of faces. There
is an unmistakable triangular scanning pattern that, when superimposed
on the picture, traces the lines between eyes and mouth. This behavior
is already in place at birth. Of all the objects that a baby could scan,
faces (and even pictures of faces) are nearly always preferred. Facial
recognition is "hardwired."7 Some of these "interaction" programs involve
both the baby and mother. Crying, smiling, rooting, nursing, and grasping
are programs present at the child's beginning. Together they work to create
a bond between the mother and baby. This bond becomes the anchor for the
baby's life. The bond and empathetic give-and-take between the mother and
baby is even generalized to the degree that babies only a few weeks old
are able to empathize with other "faces" in their worlds. Their vital signs
resonate naturally with the joy and distress of other babies as well as
with their mothers.8
Perhaps the most surprising of the inborn programs for social action is
the ability to use words. Dr. Noam Chomsky's pioneering work in language
development points to the conclusion that, although we are not born with
language, we seem to be born with an organization system in our cortex
that acts as a set of rules for grammar and syntax.9 As Chomsky studied
the way children of many diverse cultures learn language he found similarities
in the syntax mistakes children made from culture to culture. These "mistakes"
he concluded were evidence of inborn rules of grammar and syntax. Some
of these "natural" rules have to be "unlearned" in order to conform with
the child's native language. Chomsky is convinced that grammar and syntax
are inborn. At the very least, the fascination for and attention to talking
is a given for an infant. However meaningless the words and sounds, what
parent has not "conversed" with his or her new-born with the rapt attention
and even vocal response being contributed by the infant? These operations
and "rules," Chomsky would argue, are carried in our genetic code.10
The point is, babies are not "blank slates." What is etched on the genetic
slate at birth are programs and reflexes making each newborn poised to
"consume" the world, to seek out patterns in it, to commune and communicate,
recreate the secure duet it left at birth, to organize its experiences
and survive. Every child is busy recreating the world it experiences -
a world of MEANING.
Our first lesson is this: a person, although physically incomplete at birth,
does not begin life without an agenda and modus operandi. Rather, a person
shows up looking for faces, ready to eat, able to alert parents of trouble,
cautious of its space, and hungry -- voraciously hungry -- for patterns
of experience that can be made sense of. The new brain is not so much a
sponge drinking in what ever washes over it. It is rather like a very hungry
wolf looking for food in a domain it has never stalked before. Its food
is meaning. The lesson means that religious educators don't have to train
people to be philosophers, theologians and pilgrims, that is what we are.
We are not called to make people religious or to attract them to things
of the spirit, we are called to gather the resources of our traditions
and present them as tools for the spirit journeys each one has been on
since birth.
----------------------
ACTION 1 Spend a morning with a new-born person. Look for some of the behaviors
that have been described as "hard-wired." If the baby is well and satisfied,
then provide her some diversion. A small ball on a string may allow you
to see the baby's scanning, attending, and grasping ability. Be patient.
The baby has the program and intention to grasp, but may lack the muscle
control to do it well. Computer enhanced analysis of what seemed to be
random flailing of babies was indeed attempts to grasp. Watch also for
the baby's attention jumps. What gets her attention? What sounds seem to
be noticed? See if you can, play peek-a-boo. Does the baby respond? How?
Does the baby repeat behaviors? Which ones? Take time to notice the baby's
behavior and look for evidence of intention.
-------------------------
LESSON TWO: THE BRAIN CREATES THE WORLD
However incomplete, the new human embarks immediately on the hunt for meaning
and pattern. In concert with its needs for food, warmth, and touching,
the new person begins to take in the world in patterns. Eyes, ears, nose,
tongue and skin are not as discerning as they will become, but they are
sensitive to those things that are necessary to be comfortable and pleasant.
Through them, the baby's brain goes about its task of building a model
of the world that he or she begins to depend upon. Ideally, at the center
of the child's world, will be a model built out of the warmth of skin,
soft sounds and the pleasant taste and scent that it will later know as
parent. As eyes and ears begin to collect information, the child's world
widens and becomes deeper. With the help of "pre-wired" strategies, the
child is able to enjoy and even exert some control over the world. Faces
(human and animal) begin to stand out as distinct sub-models that live
in his/her world. The first year is a sort of reprise of the cosmic "big
bang" except that it happens in the head of this new human rather than
at the center of the universe. It is an explosion of patterns and meaning
within the mind of the child. The child comes into the world with no preconceptions
or expectations of what this place is. The template is blank, but with
the help of the strategies for grasping patterns, the model begins to take
shape immediately.11
Why must we depend on the models of self, home, family, yard, street, etc.?
Why is it not possible to simply take each new experience as it comes and
act within it as the raw data demands? The answer lies at the heart of
the way we think. Action grows out of understanding. We can't act meaningfully
in a situation unless we have some degree of understanding of it. Understanding
happens when what we sense in the present matches memories that we have
already arranged into a meaningful pattern. This "template matching," as
cognitive psychologists call it, makes recognition possible and at the
same time is the procedure whereby our attention gets focused.12
Let me use Jacob as an example of the way the modeling makes it possible
to recognize things and to focus attention. Jacob shared a room with his
older brother Nathan. He became "at home" with the room as a model of it
took shape in his brain. It was familiar. Not long after Jacob started
living in the room, Linda added animal pictures at eye level near his crib.
Most of the pictures showed the faces of the animals quite clearly. When
he saw them for the first time, his attention was drawn to them. He was
drawn first because his model did not include these pictures as part of
the room. His template of the room did not include what he saw on the wall.
This mismatch drew his eyes to the novelty of the pictures. His attention
was held because the pictures scored a match with another model in his
active brain: faces. Any change of the environment would have caused Jacob's
attention to become focused on the change for a moment just because of
the mismatch between expectation and experience. Jacob gazed for a long
while (long for a baby) at the pictures. He was drawn to something novel
and was surprised to recognize something pleasantly familiar. He spent
several moments going from one picture to the other touching the eyes of
the animals and making sounds babies make when they interact with their
world happily.
------------------------
ACTION 2 Playing "Peek-a-Boo" with a child is the gentle tampering with
a child's model-building. There are two elements of cognition that create
the fun the child experiences: the surprise of a template mismatch and
the almost immediate "shock" of pleasant recognition. Add to these two
experiences the element of anticipation of the "peek" or the disruption
of the child's expectations and the experience can be hilarious for the
child. It works like this: the child's line of sight is fairly uneventful
when all-of-a-sudden you intrude into it with a silly grin or expression.
Her model is disrupted and at almost the same time another one is overlaid
onto it--one that is pleasant and familiar: you. Just when that new image
is taking its place as the model of the present, you duck out of sight
only to pop up somewhere else and the process starts again. Play "peek-a-boo"
with a baby you know well and try to be aware of these elements of mismatch
and recognition. A question: why does the game finally get "old" for the
child?
---------------------------
For the rest of the Jacob's life, it will be the unfolding, evolving, and
sometimes drastically reconstructed models of life that will make it possible
for him to act and be in the world. So important is this modeling that
Jacob (like you or me) will hold on to old models and beliefs long after
the data that he gets through the senses contradicts that world view. Similarly,
he will, when an important situation or experience seems baffling, make
mighty leaps of logic and jumps to conclusions on the slimmest of evidence
just to be able to quench the nagging need to make sense of things.
So what does that mean for our task as religious educators? It means that
all the data, skills, information and concepts that make up religious curriculum
are of value to the pilgrim only to the degree they contribute to a meaningful
model of the world. It means that we will know how well we have taught
and nurtured students by testing those models, not by testing a student's
mastery of data and skills. Yet, it also means that the steps to building
high fidelity models of life must include mastery of new skills and information.
Finally, it means that our role as nurturers is primarily one of guide,
witness or docent who has absolute trust in the ability of a learner to
take what is experienced and make their own sense of the world.
LESSON THREE: THE MULTIPLEX BRAIN
In the late 70's at UCLA, methods were developed whereby a camera was able
to photograph cross sections of a human brain sequentially from base to
top. When shown at 16 frames per second the viewer is able to visually
"glide" through the physical structures of the brain. When I first saw
the film, I experienced the same sort of effect that I did on my first
viewing of a photograph of the Earth from space. As the Earth picture was
able to fill out my model of Earth-in-space, so the brain movie was able
to offer a clearer perspective of the brain-in-the- head. The readjustment
was so complete as to make it possible for me to imagine the brain in a
new way and with far more clarity and wholeness than before.
I want to offer a verbal tour of the structures of the brain emerging out
of that insight. It won't have the impact of the motion picture tour but
I hope it will reveal to you the multiplex nature of the brain: that is
the variety of ways the brain receives, processes and organizes information
and experiences. The more we understand its extensive repertoire of strategies,
the better we can craft events and experiences that will help persons build
their worlds.
BOTTOM-TO-TOP: WHERE WE THINK [see figure 1.1].
When the brain is described from the base to the top there emerges a very
definite pattern. Briefly stated, the pattern is this: the structures are
arranged as a sort of analog of the evolution of vertebrate brains. The
first vertebrates (fish, reptiles and birds) required very specific central
nervous system functions that could control the relative complexity of
their bodies. They needed a complex memory system, a complex regulatory
system and a new attention system for dealing with feeding and with predators.
Our brains contain the same structures. They are clustered about the brain
stem and are sometimes called the "reptilian brain" or the "old brain."
The first of these structures is the cerebellum. It is a golf-ball sized
structure that is our "automatic pilot." When Jacob was learning to walk,
he had to perform a very deliberate and considered set of actions. As his
muscles became more responsive to his intentions, the set of operations
that he had to perform became automatic. Now he runs, jumps, and walks
without a thought about the complicated concert of motions that are required.
In fact, if he had to think of all the steps needed to run he would not
be able to do it. The motions are now orchestrated and timed by the cerebellum
automatically. Every vertebrate animal has a well developed cerebellum
or its like.13
If the cerebellum is the automatic pilot, the ascending reticular system
is the alarm and regulatory systems. Like a shaft buried up into the brain,
the reticular system is made up of the Medulla Oblongata (regulates essential
functions like breathing), the Reticular Formation (regulates sleep and
wakefulness and is responsible for arousing the attention of the cortex),
and the Pons (also responsible for awareness and attention).14
Located at the top of the pons and around it like a mushroom are the structures
known as the "mid brain" or the Limbic System. The Mid Brain includes the
Thalamus (responsible for routing impulses from the old brain and the mid
brain to the cortex as well as for the generation of emotions), the Hypothalamus
(responsible the sending signals of hunger, thirst and sexual arousal to
the cortex), the Hippocampus (responsible for linking new experience and
insights with pleasure and for differentiating very close sequences of
experience into serial events that the cortex can decode into meaning --
as in reading or listening to a person's words) and several other tiny
structures having to do with emotions, smell and the integration of the
various structures. The Limbic System is the source of our emotions, pleasure,
pain, and spurs the cortex to action with help from the pons.15
Finally, at the top of the brain like a cap protecting the more primitive
structures is the cerebral cortex. Whereas the old and mid brains have
very definite functions for each structure, the cortex is the "generalist"
member of the brain "team." It is responsible for functions like memory
storage, planning, meaning making, calculation, speech, voluntary muscle
control and consciousness. Many of these functions are not located in specific
places. In fact, some seem to be spread out all over the cortex. It is
the most massive of all the structures of the brain and is the latest development
in animal evolution.
So, as we scan the brain from bottom to top, what is revealed is a living
chronicle of brain evolution. At the base, automatic regulatory functions
grind on from moment to moment. In the mid brain the mechanisms for attention,
arousal and emotions find their origins. Then in the cortex, meaning and
moment combine with feeling and attention to generate meaning, thoughts,
voluntary action and self awareness.16
BACK-TO-FRONT: WHAT WE THINK [see figure 1.2]. As
the bottom-to-top scan tells us some-thing about the natural history of
the brain, the back-to-front scan can tell us something of the vastness
and range of functions that find their origins in the cortex. This is not
to say that one can locate all these functions in precise positions (although
some can be located), rather it is to say that there are general areas
of the cortex that are dedicated to more-or-less specific functions and
as we consider these areas from back-to-front we will gain a sense of the
cortex' enormous work and general "division of labor."17
The cortex is grayish in color, divided into two halves or hemispheres,
and is convoluted into folds. Yet it looks uniform. Let's begin at the
back of the brain and move forward with an eye toward discovering some
of the functions that are more-or-less localized. The very back of the
cortex is that area called the Occipital Lobe. This palm-sized area is
the receiver of nerve signals from the eyes. It is responsible for the
decoding visual information into patterns that can be compared to visual
memories and models already in the brain. If there is any part of the cortex
that has a special look to it that sets it apart from the rest of the cortex,
it is this area. The occipital lobes (or "striate" or "visual" cortex,
as the area is sometimes called) are actually a magnified "map" of the
eyes' retinas. The cell arrangement of this area is such that it looks
striped and the cells receive data from a corresponding area of either
the right or left half or the retina of each eye.18
The largest part of the cortex are the Parietal Lobes occupying roughly
the middle top and sides of the cortex. They include the areas that deal
with touch, language (on the left side more so than on the right), motor
control, and other of the senses. However, most of the cells of the Parietal
lobes are "uncommitted." That is to say that there is no specific action,
perception or cognition that is controlled by the uncommitted region.
Below the parietal regions on either side of the brain are large folds
called the Temporal Lobes. These lobes are concerned with the interpreting
of signals from the ears, contribute to our sense of scale when we perceive
objects visually and there is some involvement of the temporal region in
"tagging" memories with the emotional tone that we might call "familiarity."
This latter conclusion is supported by experiences of persons who suffer
from epilepsy originating from a temporal lobe. It seems that when the
emotional tone is recalled by itself, it causes what is popularly known
as "deja vu." The tone comes to consciousness along with the sense that
what ever one is presently experiencing is familiar. We all have those
experiences. Temporal lobe epileptics are flooded with this deja vu feeling
during a seizure.19 Beyond these functions, the cells of the temporal lopes
are also uncommitted.
The two Frontal Lobes are highly developed in human beings. Other primates
have them, but they are not as prominent as they are in humans. Although
they too contain large areas of uncommitted neurons, there are three specific
functions that operate there. One is the decoding place of signals from
the olfactory nerves that allow us to perceive smells.
The second function of the frontal lobes has to do with planning. From
this front part of the brain, originates the mechanism for keeping our
attention on a plan that we devise. When we set a plan in motion, its success
depends on our keeping our minds on the end goal as well as keeping the
steps in our consciousness. This is accomplished by a peculiar brain wave
frequency that is generated in the front of our heads. It is called the
expectancy wave (the Contingent Negative Variation or CNV Wave) and is
a sort of "place keeper" as we plan. If you have ever become distracted
from what you were working on and forgotten a task in progress, you may
have experienced a nagging feeling that there was something that you forgot
or left unfinished. That feeling is a product of the CNV wave trying to
pull you back to the unfinished task.20
The third function located in the frontal lobes has to do with inhibitions
and social restraint. Taboos, mores, and social convention are enforced
from the front of the brain. Perhaps the most dramatic evidence of this
connection between the frontal cortex and social restraint comes to us
from the unfortunate experience of Phineas Gage. Mr. Gage was a Vermont
railroad foreman who, in 1848, was struck in the head by a metal rod as
a result of an explosion. The rod went clean through his forehead and left
frontal lobe.
Gage survived without any impairment to his overall health or intellect.
However, kindly, patient, hard-working, soft spoken Phineas Gage became
for the rest of his life "fitful, irreverent, indulging at times in the
grossest profanity ...manifesting but little deference to his fellows,
impatient of restraint or advice when it conflicts with his desires." (quoted
from his physician) When Gage died, an autopsy revealed extensive damage
to the front portion of his left frontal lobe. He was described as child-like
in his attention span and awareness of the social consequences of his actions.
Child-like is an apt description because the frontal lobes are not fully
developed in humans until perhaps 5 or 6 years of age.21
This back-to-front look at the cortex leads me to two perceptions. The
first is that the cortex has a lot to do. It is not that the tasks are
so varied, rather it is that the over-all job that the tasks contribute
to is so large. By receiving and assimilating the constant input from the
senses, the cortex is fired up by the older parts of the brain to remake
the outside world on the inside; not just the physical world, but the ecology
of social and human interconnection of which it is a part. It is an impossible
job, yet, here we are!
The second perception is that the cortex has to be flexible and efficient
enough to always be "making up its mind." Thus the millions of uncommitted
neurons wait to be programmed and reprogrammed with memory, skills, plans,
perceptions, cognitive processes and awareness. While there is an impressive
difference between the other mammals and humans as to the size of the brain,
the more impressive difference is in the amount of uncommitted cerebral
cortex. Our 'gray matter' is a vast storehouse and processing plant for
our perceptions of the entire universe!
LEFT-TO-RIGHT: HOW WE THINK [see figure 1.3]. The
third axis that can be meaningfully travelled is the one that explores
the cortex from left to right. The back-to-front look reveals to us various
places that the cortex uses to arrange and model the physical and social
world. The left-to-right look shows us a range of thinking styles that
we employ in order to understand and add to the world.
The left and right halves of the cortex are, on the surface, roughly mirror
images of each other (see fig. 1.4 in "Synapse"). There is some evidence
that one tends to be larger than the other, but the data indicates that
it is a matter of individual diversity. The two halves or cerebral hemispheres
are connected by a thick "cable" of 200 million nerve fibers called the
corpus callosum.22 At birth, this connector is relatively small and does
not function to the capacity that it does in adulthood. Some time during
adolescence, the connector reaches its mature size and function. It is
through this connector that most of the information and cognitive abilities
of the two sides are integrated.
Nothing in our physical make-up is without function, and that is especially
true of the brain. What are the functions of two-sided nature of the cortex?
First, its lateralized nature means that the spatial sensations (touch,
sight, hearing, and to a degree smell) are registered in the cortex spatially.
The left brain receives the impulses that represent the right side of the
world and the right brain receives the left. Likewise, the lateralized
nature of the cortex means that the voluntary muscles of the body that
are mirrored on each side are instructed from one side of the cortex' motor
control or the other. The left side of the body is instructed by the right
motor area and the right side of the body is instructed by the left motor
area of the cortex.23
But there is more. There are some functions that are controlled from one
side only -- without any mirrored control on the other. Language is the
clearest case in point (refer to illustration 1.2). Since Paul Broca first
documented the relation of brain damage to the loss of speech around 1860,
it has been more-or-less taken for granted that speaking, and understanding
words are functions that are controlled (in most people) from specific
areas of the left cortex. In fact there are two areas that are now known
to control language functions: Broca's Area24 located just above the left
temple (it controls the ability to form spoken words), and Wernicke's Area25
located above and behind the left ear (it controls the ability to understand
words). When there is injury to any of these areas, there is language loss
of some kind. There is no corresponding area on the right side.
What is found when there is damage (due to accident or stroke) to the right
cortex is that spatial perception is most often affected. Victims of this
sort of damage are many times left without any awareness of one whole side
of their world or are no longer able to find their way from one place to
another. One of the puzzles of the asymmetry of the cortex is that some
of the functions that are lateralized in adults seem not to be lateralized
in children. Language is again the prime example. Medical research into
cases where there has been brain damage to the speech centers of adults
usually show little return of full speech. Yet similar damage to children
does not mean loss of speech anywhere near the rate it does in adults.
The younger the child, the better the recovery. The conclusion that this
sort of research has led to is that speech and language in young children
is still not permanently located on one side or the other. If there is
damage to what is becoming the speech center, the uncommitted cortex is
new and vast enough to take up the slack.
In adults, the cortex is not so pliable or unused.
The asymmetrical nature of what the cortex does has spawned a great deal
of research, debate and conjecture. When it is sorted out as well as can
be at this stage of knowledge, what is firm is that the left cortex is
the verbal/logical brain and the right cortex is the visio/spatial brain.
Not only does this mean that the left brain controls speech and language
understanding and the right handles visual and spatial data, it also means
that the way that memories and data are processed by the left tends to
be verbal and sequential and that the right tends to use images and be
more holistic. The thinking styles of the left and right are different.
Just how they are different is hard for scientists to pin down but a composite
list of right-left thinking style descriptions looks like this:
LEFT------------------------RIGHT
-----------------------------------
logical-------------------intuitive
intellectual--------------sensual
rational------------------mythical
abstract------------------concrete
sequential----------------holistic
verbal--------------------visual/spatial
scientific----------------poetic26
There does, then, seem to be two ways of processing information corresponding
to the two hemispheres, but within the two hemispheres there is even more
division of labor. Evaluating human cognitive abilities just in terms of
right-left thinking skills is a bit too simple. The split-brain research
has led to research about intelligence in general and the discovery that
we have at least seven distinct cognitive abilities. Asymmetry studies
paved the way to this broadened view of intelligence. We will look at this
fresh approach in a later chapter.
THEME AND VARIATION My intention has been to give the reader a glimpse
of the "equipment" of the brain and of some of its essential programs with
which we are born. I have tried to show that these programs and the organization
of the brain make us beings that seek pattern and meaning in our experience.
Further, we create models of the world in our brains that allow us to interact
with the world and to be creative within it (see fig 1.5 in "Synapse").
This is the "theme" around which each of us composes unique variations.
Jacob was born "itching" to find and create patterns within a meaningful
world. From here on out his models and creations will be similar to others
but still one-of-a-kind in a world full of one-of-a-kinds. How fulfilled
and creative his pilgrimage will be will depend on many factors but at
the base, three cognitive factors will be at work: 1. his ability to use
both his verbal/logical and his visio/spatial thinking styles and their
related functions, intelligences and programs, 2. his ability to acquire,
use and reorganize his stock of knowledge and memories that are "high fidelity"
models of the world as it is, and 3. his ability to be a self aware agent
within his world. It is from these three abilities that a person can engage
and contribute to a world.
Where this point of view intersects with the church is in the acquiring
of these three abilities and a stock of knowledge. In the church we are
concerned with the pilgrimages of persons. Each person walks the same ageless
path toward meaning but with a unique stride. It is our vocation to help
in the equipping of pilgrims. What would we conclude if we test the content
and methods of education and nurture in the church? Would we find it strong
or weak from this cognitive perspective? Would we find that we are encouraging
fresh variations on the human theme or would we find that we are trying
to teach only one song? Would we find that we are encouraging religious
thinking and acting that is mostly verbal or visual? Would we find persons
being encouraged to be creators and pilgrims all their lives or simply
for the first 18 years? Would we find that the methods we use for education
are a pleasure or a bore? Would we find a richness of history and tradition
that adds to a person's usable stock of knowledge and self awareness or
would the history and tradition be scattered around as stumbling blocks
for seekers? Would we find teachers that are respectful guides or controlling
keepers of secrets?
I have no doubt that the brain works in such a way that human beings cannot
help but be religious. We are biologically moved to seek faith and live
in fidelity with our visions -- our models -- of the universe. If that
drive is propelled by the motor we call the brain, then religious educators
and leaders must look closely at how it works. Not only will we be informed
in the way we nurture faith, we may also see the imprint of that which
makes life and meaning possible.
-----------------
Notes for Chapter One
1 R. Thompson, The Brain - An Introduction to Neuroscience (San Francisco:
W.H. Freeman & Co., 1985): 253
2 J. Z. Young, Programs of the Brain (Oxford: Oxford University Press,
1978): 146
3 K. Klivington, The Science of Mind (Massachusetts: MIT Press, 1989):
147
4 Young, 9
5 I. Rock, Perception (New York: Scientific American Books, 1984):
83
6 Young, 117
7 Ibid., 120
8 Ibid., 146
9 J. Campbell, Grammatical Man (New York: Simon and Schuster, 1982):
127
10 C. Hampden-Turner Maps Of The Mind New York: MacMillan, 1981):
146
11 J. Anderson, Cognitive Psychology and its Implications (San Francisco:
W. H. Freeman, 1986): 32
12 C. Furst, The Origins of the Mind (Inglewood Cliffs, N.J.: Printice-Hall,
1979): 45-46
13 Ibid., 28
14 J. Fincher, The Brain: Mystery of Matter and Mind (New York: Torstar
Books, 1984): 22
15 Ibid., 122
16 G. R. Taylor, The Natural History of the Mind (New York: Dutton,
1979): 29
17 Thompson, 24
18 Furst, 39
19 Taylor, 154
20 Furst, 189-90
21 Klivington, 195
22 S. Springer & G. Deutsch, Left Brain, Right Brain, 3rd ed.
(San Francisco: W. H. Freeman, Co. 1989): 67
23 Klivington, 135
24 G. Miller, The Science of Words (New York: Scientific American
Library, 1991): 96
25 Ibid., 174
26 Springer & Deutsch, 284