Page 147 - The Miracle of Electricity in the Body

Adnan Oktar (Harun Yahya) 145

The wisdom behind sensitivity levels not being the

same everywhere in the body
Blind people can read the Braille alphabet with their fingertips, but
not with their knuckles or teeth, for instance. That is because the level of
sensitivity in the fingertips is very much greater.

There are some 640,000 sensitive skin receptors spread over the sur-
79
face of the body. The density of these at the fingertips is 9,000 to the
square inch, and they react in a millisecond to even the slightest friction.
That lets us use our fingers for jobs requiring great sensitivity. Our el-
bows, however, are far less sensitive. There is considerable wisdom be-
hind this: Were things the other way around, it would be exceedingly
uncomfortable to rest your elbows anywhere, since they would feel the
slightest roughness. And you would have to use your elbows to feel the
roughness or smoothness of any surface. The body is specially created to
fulfill all our needs, to be easy to use.

The wisdom behind touch receptors adapting to
constant stimuli

Touch receptors react to sudden changes, but soon adapt to fixed
stimuli. The brain is informed about the beginning of a contact and its
end, but there is not such a heavy flow of information about the contact
in between. There is great wisdom in this, because generally we do not
need to be constantly informed about whatever may be touching our
skin. It is sufficient that the touch receptors transmit information only
when there is a change, which makes our lives very much easier. The
ability of touch receptors to adapt quickly to constant stimuli is an im-
portant advantage of the nervous system. 80
For example, when you put on your clothes in the morning, various
receptors initially send your brain information concerning their weight,
softness and pressure. But soon afterwards, these messages decrease and
eventually cease, because, as already seen, receptors stop “reporting”
constant stimuli at the same level of intensity. In the same way, when we