Coeur d'Alene evening press. (Coeur d'Alene, Idaho) 1907-1929, 1908-01-22
WORK OF THE BRAIN
Curious Facts About the Human
Thinking Apparatus.
WHERE THOUGHTS ARE BORN.

Right Handed Persons Form Ideas In
the Left Half of the Brain and Left
Handlers In the Right HaIf-Strange
Freaks of Mental Blindness.
Common opinion has 1t that the
thinking is done in the front part Of
the brain, so that n high forehead
means lofty intellect. Common opin-
ion, 1t turns out, is precisely wrong.
More haMl thinking is done at the back
part Of the head than anywhere else.
Much of the rest is done in q region
JUST above the ears.
When the thinking involves action
the sides and top Of the head play their
special part. In fact, about the only
portion of the outer layers of the brain
substance that has never been found
to have the least connection with any
sort Of thinking is that lying above the
eyes.
There Is another curious fact about
the thinking apparatus. Nine men out
of ten at least do all their thinking ON
the left side of the brain and might,
as far as their purely mental opera
lions are concerned, get on just as well
II the entire right half were removed
To be sure, tumDr on the right side
of the brain, broken blood vessel or
a dislntegratlon of the brain substance
Is apt to cause more or less complete
and permanent paralysis of correspond
ing groups of muscles, always, of course.
on the left side Of the body, since, as
Is well known, nearly all the nerve
fibers In passing from the brain to the
body organs cross over to the other
side.
Such an injury to the right side of
the brain, however, does not in gen.
eral affect the mind. This remains as
clear and sane and vigorous as ever.
On the other hand, the very same In
jury to the brain which on the right
side affected only the body will when
1t occurs on the left side affect the
mind as well. To paralysis of the mus
Giles is added rurtailment of the think
Ing powers.
There have been men who have lost
a cupful of brains out of the right side
Of their heads and retained all their
mental faculties unimpaired There
have been other men in whom the loss
of a half a thimbleful from the left
side has rendered them for the re-
malnder of their lives unable to rec
ognize by sight their own wives.
/ have said that most men do all
their thinking on the left side Of their
brains. The remainder use only the
right sides of theirs. These, moreover,
are the left handed men.
Apparently, too, right handed men
are right eyed men also, and not only
sight a gun OF use a microscope with
the right eye, but also sit to drive or
stand to bat or grasp tools in the way
that will give TO that eye the more I'M
impeded view, In addition, right hand
ed men are also right eared-while
they hear with both ears, they listen
with the rlght-as any one may test
In his own case for himself.
Left handed men are corresponding
ly left eyed and left cared. Thus, the
centers for the more skillful hand and
probably foi the better trained eye
come normally on the same side of
the brain as the thinking apparatus,
so that the eye, hand and thought
work together.
In general. then, all the thinking is
done on the left side of the brain.
Can we not go farther and say that
particular kinds Of thinking are done
In particular regions of the left cor
tex?
The nhpanoIoOistS Of nourSa have
the entire brain mapped out like city
observation-disclosures here, order there.
This part Of ones brain operates when
he puts away his shoes in the closet,
that when he throws them at the cat.
Now, as u matter of fact we have
faculties" In the mind and Organs"
In the brain about as much as we
have a baseball playing muscle and a
wood saving muscle and still another
muscle for standing still. The brain
acts as a whole just as the body does.
We use all our muscles to play bali,
and we use them all to saw wood.
have already touched upon the
case of the man who suddenly lost the
ability to recognize his wife. This
man, who was a workman in Glas-
gov, had his skull fractured by blow
on the left side of the head about mid
way between the ear and the crown,
SO that a splinter of bone became Inn
bedded in the gray matter of his brain.
At once be lost the capacity for think
ing about what he saw.
Though his sight was sharp enough,
he couId not rerocniza the most famil
lar objects. His friends, his children,
his wife, appeared merely as colored
spots, yut otherwise his mind was
clear, ana the moment any Of them
spoke he knew them at once. He could
not tell lay eyesight how many fingers
We're held up before his face, but by
touch he could count them as well as
aver.
Stln stranger freaks OF mental blind