



CHAPTER ONE
Learning Disorders and the Human Brain
THE IMPORTANCE OF SUCCESS
Success is like a vitamin. Everyone needs some
of it. When you don't have enough success, it's hard to feel very
good about who you are, especially when other people around you
seem to have plenty of success. When you're growing up, school
is the place where you learn the most about success-what it is,
how to find it, and how much of it you usually have. You can tell
how successful you are just about every day in school. You compare
yourself to other kids, and other kids compare themselves to you.
If you learn quickly and easily, if you are good at pleasing your
teachers and your parents, if you feel as capable as other students,
school can be a great experience. But for some kids, school is
no fun because they have trouble succeeding, and they just don't
feel good about learning.
THE IMPORTANCE OF KEEPING AHEAD IN SCHOOL
Often students who are doing poorly in school subjects come to
feel that they are behind in everything. They don't realize that
there are many ways to "keep ahead" in school. When
you are having a hard time in school, you can keep ahead in your
feelings about yourself, in your desire to overcome your difficulties,
and in the activities in your life that you are very good at.
Everyone can and should keep ahead in some ways. Many students
have to work especially hard to keep ahead in their feelings about
themselves. This is because their performance in school is so
disappointing to their parents, their teachers, and themselves.
Very often these students have various kinds of learning disorders.
HOW LEARNING DISORDERS AFFECT YOUR LIFE
Learning disorders are problems that affect some students. These
problems make it hard to keep up in school. This doesn't mean
that students with learning disorders are dumb. Their problems
are not their fault. In fact, a student can be born with a learning
disorder but no one will know about it until the student tries
to do certain things in school. For example, it is possible to
be born with a weakness in your memory that doesn't cause any
trouble until you try to learn the multiplication tables or write
a book report. Learning disorders can affect just about everything
you try to do in school and also many things you try to do outside
school.
KINDS OF LEARNING DISORDERS
There are many different kinds of learning disorders, and some
of them cause big problems for kids. Learning disorders may make
it hard for someone to learn to read, write, spell, or do mathematics.
As we shall see, there are also learning disorders that wreck
your ability to make friends and be popular with other kids. A
learning disorder may make it hard for you to concentrate; it
may cause your mind to drift or wander a lot of the time. A learning
disorder can affect your memory or your ability to understand
and use language as well as other students in your class. One
form of learning disorder can ruin the way your brain figures
out certain kinds of information coming in through your eyes.
Another kind of learning disorder makes it hard to solve problems
and think about certain types of ideas. Some learning disorders
affect the way your muscles work. Somehow, your brain may not
tell your fingers or your arms and legs exactly what to do and
when to do it. Poor messages from your brain to your muscles can
make you hate writing or have trouble playing certain sports.
Most kids who have school problems have more than one kind of
learning disorder. For this reason, we will talk about a kid's
learning disorders instead of his or her learning disorder.
THE POSITIVE AND NEGATIVE SIDES OF LEARNING
A learning disorder is not a disease. When you have a disease
or an illness, it usually has a definite cause. The disease is
abnormal, and we hope it can be cured. A disease like chicken
pox has no good parts to it. But learning disorders are not completely
bad for you. In fact, sometimes, having learning disorders can
help you develop your strengths. For example, dealing with learning
disorders can teach you how to bounce back from feeling low, how
to solve problems, how to come from behind and end up a winner.
Some students who have nothing but success all through school
never really learn how to deal with problems. Such students may
not be ready for the real world when they grow up and have problems
at work or at home. So, there really is a bright side to learning
disorders!
Unfortunately, though, certain learning disorders
can make school very rough for you at a time when you'd like to
be admired and in a place where you should be feeling successful.
Also, if you can't learn and work very well in school, you may
have a hard time becoming the kind of adult that you would like
to become. So, if school is a problem for you because you have
learning disorders, you need to understand them and try to overcome
them so that they won't stop you from having success when you
grow up.
THE CAUSES OF LEARNING DISORDERS
Sometimes learning disorders seem to run in families. Brothers
and sisters, cousins, parents and their children may be similar
in their learning disorders. You may have trouble reading, and
you may find that your mother or father or uncle had the same
kind of problem in elementary school. Sometimes an illness that
you have early in life may bring on a learning disorder later,
but proving this kind of connection can be pretty difficult. Actually,
we don't really know what causes most learning disorders. We do
know that they usually have something to do with differences in
the ways people's brains work.
HOW THE BRAIN AFFECTS ABILITIES
In most cases, a student with learning disorders has part of his
or her brain that does not work well when it has to do certain
things. In fact, though, nobody's brain is perfect. Some people
can't learn to whistle. Others have trouble remembering names.
Some people can never learn to play the piano, juggle, sing, or
recall telephone numbers. Because everyone has different strengths
and weaknesses, we are all different from each other in the ways
in which we function. That's why kids with learning disorders
are really not so different from everybody else. But, unfortunately,
kids with learning disorders have differences that interfere with
their academic lives. For example, if you're not so good at juggling,
you can still do well in school. However, if you are not so good
at remembering what certain words look like, school can become
a big problem for you. Fortunately, we can work on learning disorders
even when we don't know what caused them. Of course we do need
to figure out what kinds of learning disorders are causing a student
to have trouble when he or she is trying to succeed in school.
Since most learning disorders have something to do with the way
our brains operate, it is probably a good idea to present some
facts about the human brain and how it is supposed to work.
THE CENTRAL NERVOUS SYSTEM
As you may know, your brain and your spinal cord, which runs down
your back, make up your central nervous system. It is called central
because it serves as the central "office" for all kinds
of information and jobs.
The Spinal Cord: The central
nervous system is divided into regions, each with its own jobs
to accomplish. The region at the bottom is the spinal cord inside
the middle of your back. The spinal cord receives all the information
from nerves in your skin and muscles-information about things
like temperature, pain, and your position in space. The spinal
cord is also responsible for sending out orders through nerves
that connect with muscles so the muscles can move the right way
when you want them to. This information that keeps coming into
and going out of the spinal cord connects the higher parts of
the brain to various parts of your body.
The Brain: Your brain, located
inside your skull, is made up of billions of tiny nerve fibers
that connect with each other in many different ways. The brain
is so complicated in its "wiring" that it should not
be surprising that no two brains are exactly the same. This means
that there can be a great number of different learning strengths
and learning disorders among people, including kids in school.
Sometimes it's hard to be sure what's normal and what's abnormal.
The Brainstem: The brainstem
is just above the spinal cord. It gets information and sends out
signals to the skin and muscles of your head and neck. The brainstem
also works like an extension cord for some of your senses, including
hearing and touching. For example, if you touch something with
your left thumb, the feeling that you get has to pass through
nerves that go through the brainstem to get to parts of your
brain that can think about what you've touched. Incidentally,
smelling and hearing do not have to go through the brainstem.
They are allowed to connect directly with the thinking parts of
the brain (without an "extension cord").
Your brainstem also has other responsibilities.
It controls swallowing, breathing, talking, heart rate, the flow
of your blood and your ability to see. By the way, the brainstem
does not have only pleasant chores; it's the part of the brain
that makes you vomit!
The Cerebellum: In the back
of your brain is a region called the cerebellum. The cerebellum
is responsible for fine tuning your muscle movements. It is the
cerebellum that can make you really excellent at doing things
with your hands or at playing a sport.
A great football player, artist, or guitarist
must have a super cerebellum! The cerebellum almost never gets
any credit for its work. It may be that a great athlete should
receive a trophy for having the "cerebellum of the year."
The cerebellum works very closely with the basal ganglia. The
basal ganglia are groups of nerves that cooperate with the cerebellum
to make muscles work very smoothly so that they don't shake too
much or keep missing the mark when they try to do something.
The Hypothalamus and the Thalamus:
Up above the brainstem are two important parts of the brain called
the hypothalamus and the thalamus. The hypothalamus performs many
crucial functions. It helps control your appetite, your thirst,
and the temperature of your body. The hypothalamus also has a
lot to do with certain feelings that you get. For example, the
hypothalamus helps you deal with both angry and peaceful feelings.
The thalamus, which is right above the hypothalamus, is like a
great relay station. It receives all the signals from lower parts
of the body, such as your arms and legs, and sends them up to
the higher regions of your brain. Every sense except smell goes
up through the thalamus. You can also say that the thalamus is
like a fuse box. Just as electricity comes into your home through
the fuse box and then gets sent on to various rooms, information
from your senses goes through the thalamus on its way to the regions
of the brain that will think about it and use it.
The Cerebral Hemispheres: The
highest region of your brain is divided into two halves that are
joined together by millions of nerve fibers. These two halves
are called the cerebral hemispheres. The two hemispheres look
alike. But if you study them carefully under a microscope there
are differences between them. In most people, the left hemisphere
controls language and information that comes in or goes out in
a particular sequence or order. The right hemisphere often specializes
in visual patterns and in information like the parts of someone's
face, that comes in all at once. The left hemisphere often likes
to work more quickly, while the right hemisphere is a bit slower.
The Lobes of the Brain: To complicate
things, each of the hemispheres is divided into lobes. The frontal
lobes are right behind your forehead. In some ways they are the
"orchestra leaders" of the brain. They help you to concentrate
by allowing you to find and use the proper part of the brain for
whatever you're doing at the moment. Your frontal lobes will "light
up" the part of your brain that figures out language when
someone is talking to you. At the same time, your frontal lobes
might turn down the visual parts of your brain so you won't be
too distracted while you're listening. The frontal lobes also
help you control your behavior and your emotions. Therefore, they
can help you get along with other people. A lot of popular kids
have outstanding frontal lobes!
Behind the frontal lobes are the parietal lobes.
The parietal lobes contain the sensory cortex which is the part
of the brain that receives information from all of your sensory
organs such as your eyes, your ears, your skin, and your sense
of smell. The sensory cortex helps you figure out what these different
sensations mean and what to do about them. Once you have decided
what to do about your sensations, you can tell your muscles to
work in a particular way. Getting muscles to move takes place
at the back of each frontal lobe just in front of the parietal
lobe in the motor cortex. Each motor cortex may seem a bit mixed
up because the motor cortex in the right hemisphere controls all
the muscles on the left side of your body, and the motor cortex
in the left hemisphere moves all the muscles on the right side
of your body. The motor cortex works closely with the cerebellum
and basal ganglia so that your muscle movements will be smooth
and accurate.
The occipital lobes sit just behind the parietal
lobes. The occipital lobes help you understand information that
comes in through your eyes. They figure out what you're seeing
so that you can tell whether something is on top of, underneath,
or next to something else. The occipital lobes help you catch
a ball and do other complicated things with your eyes.
The temporal lobes are just beneath the parietal
lobes. They have a lot to do with information such as language
that comes in through your ears. Your temporal lobes are also
needed for memory. But memory is scattered everywhere throughout
the brain, and there are many different kinds of memory. For example,
there is memory for faces, vocabulary words, spelling, and smells.
Since nobody completely understands all parts
of the brain and their connections, nobody completely understands
all the possible disorders that can cause kids to have a very
hard time at school. Fortunately, there are many important things
we do know. This book is intended to help students understand
what we know about learning disorders. If a student has learning
disorders and understands what they are and how they work, life
will be a lot easier.
What you have just read in the preceding paragraphs
is actually a very quick "tour" of the brain. As we
have said, the brain is extremely complicated. Different regions
of the central nervous system have to work very hard during a
school day. Parts of the central nervous system are connected
with each other, and they have to communicate with little time
off. There are still many brain parts and activities that nobody
understands. Experts spend their whole lives studying the human
brain, but we still don't know exactly how people think or how
they remember.
HOW LEARNING DISORDERS CAN CREATE MISUNDERSTANDINGS
One of the big problems with learning disorders is that they can
cause kids to be misunderstood by grown-ups. Also, a kid with
learning disorders might not understand himself or herself. Learning
disorders may look just like laziness, when really the problem
isn't laziness at all. A student may appear to be lazy because
she is not getting good results in school, and then she just stops
trying. For some students, schoolwork requires superhuman effort,
so much effort that they may decide not to try.
This can make people think that they are poorly
motivated or that they just don't care (when they really do care
a lot).
WHY SOME KIDS WITH LEARNING DISORDERS
PUT ON DISGUISES
Learning disorders can make a kid look or feel dumb or stupid.
Sometimes when students feel dumb, they intentionally put on some
disguises, hoping no one will find out that they feel dumb. These
disguises might include being very cool, becoming a class clown,
acting tough and getting into fights, pretending not to care about
school, criticizing school (saying it's useless or dumb) or becoming
very quiet in order not to be noticed.
Unfortunately, a disguise may cause more problems
than a learning disorder itself! Sometimes parents or teachers
notice behavior that is really a disguise, and they think that
the behavior itself is the whole problem. A teacher might say:
"If only you would behave, you'd start doing better in school."
Down deep inside yourself, you might think: "If only I could
do better in school, I might start behaving. If I got good grades,
I wouldn't need to act so tough and cool."
The disguises that cause the most trouble are
found among students who do not understand their own learning
disorders. Misunderstandings can lead to nasty arguments. Once
you understand your learning disorders, as well as your strengths,
there is a whole lot you can do about them, so you may not need
to disguise them as much. You can actually work on them and around
them!
Some kids try to put down school. They criticize
it. They say it's useless. Often, they say these things because
they feel bad about how they are doing in school. In other words,
they are trying to cover up their true feelings or fears about
schoolwork.
HOW THIS BOOK CAN HELP YOU
This book is not supposed to help you diagnose yourself or figure
out exactly what's right and what's wrong in your brain. That's
very hard to do. There are experts who are trained to give tests
and study your schoolwork to find out which learning disorders
are a problem for you. This book should help you understand many
different kinds of learning disorders; you might wonder about
the presence of some of these in yourself or in your best friend!
If there are parts of yourself that you recognize in this book,
you can mention them to your parents, teachers, or other adults
who are trying to help and understand you. For example, you might
say to a school psychologist, "I think I might have a language
disorder. From your tests, do you think this is possible?"
In other words, this book may help you to help other people think
about you. In a way, you can become a member of a team that is
trying to understand and improve your life at school. Your ideas
and your opinions are very important and often correct. You should
not be afraid to speak up about yourself and what you think you
need. More than anything else, this book is intended to help you
feel good about school, about yourself, and about the things that
make you different from everyone else.
Many students have problems that they take to
school with them. They often feel it is important to cover up
their problems, to appear happy when they are really worried.
To do this, they "put on" disguises to make other people
think that they have no problems. Inside, however, such kids may
be very anxious.
A WAY TO READ EACH CHAPTER
Each of the upcoming chapters in this book will begin with a story
about a student who has one or several kinds of learning disorders
discussed in the chapter. As you read these descriptions, or stories,
notice not only the learning disorders but also the strengths
that each of these kids has. Following the story, there will be
questions for you to think about or discuss after you have read
the chapter.
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