Page 133 - The Miracle of Electricity in the Body

Adnan Oktar (Harun Yahya) 131

Origin of nerve signals Extraordinary coordination between the brain
initiating movement and muscle cells is necessary just to lift your
arm.
Cerebral
cortex How the muscles work
Muscle
Motor
Biceps
Motor neuron nerve
Motor nerve
fibers Motor nerve
ending
Spinal cord Acetylcholine
released
Acetylcholine
Triceps sac Motor nerve
ending
Pectoralis
major muscle

Muscle fiber
Muscle fiber contracts
Space between cells

We hold our arms out when someone throws a ball to us, also care-
fully examining the ball’s angle of approach. Yet at the same time, the
electrical signal reaching our eyes is being carried by the axons to the
nerve cell, and transmitted from there to the brain for analysis. This way,
we recognize everything we see, whether it is dangerous, and what kind
of reaction we need to take. Again through the same communication sys-
tem, the brain commands the arms to catch the ball. The details of the
physical and chemical processes are so complicated they would fill
many pages.

The Cerebellum That Harmonizes Actions

The cerebellum, that part of the brain responsible for balance and
movement, consists of millions of neurons, despite representing only a
tenth of the brain’s volume. This small piece of tissue constantly gathers