Parts of Somatic Nervous System
There are 43 segments of nerves in our body and with each segment there is a pair of sensory and motor nerves. In the body, 31 segments of nerves are in the spinal cord and 12 are in the brain stem.
Besides these, thousands of association nerves are also present in the body.
Thus Somatic Nervous System consists of three parts:
i) Spinal Nerves: They are peripheral nerves that carry sensory information into the spinal cord and motor commands.
ii) Cranial Nerves: They are the nerve fibers which carry information into and out of the brain stem. They include smell, vision, eye, eye muscles, mouth, vision,. Taste, ear, neck, shoulders and tongue.
iii) Association Nerves: These nerves integrate sensory input and motor output numbering thousands.
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