Page 106 - Darwin's Dilemma: The Soul

Darwin’s Dilemma: The Soul

The sensation that arises when we
Skin
touch something reaches us only as
an electrical signal. Any sensation of
matter we perceive comes into being
solely by way of electrical signals.
Therefore, we can never touch the
original of any object that exists out-
side. It is impossible, based on the
perception forming inside us, to
know what a physical object is really
like or to know the nature of the ex-
ternal world.

The illustration shows the processes
taking place from the fingers to the
brain after touching a single button.

Meissner’s
corpuscle

Node of
Ranvier

Direction
of nerve
Schwann cell
impulses

Myelin sheath

Axon

Direction of nerve
impulses

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