Your central nervous system

From: Joe Weider's Muscle & Fitness | Date: November 1, 1998| Author: | Copyright information

The central nervous system (CNS) is composed of the brain and spinal column, both of which are responsible for all human movement. Basically, the CNS is a closed-loop system where the brain sends impulses through the spinal column to the muscles, signaling them to either contract or relax. The muscles likewise send signals back to the brain, providing it with valuable sensory input. These nerve ...

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