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11 Feb 2012
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The motor system consists of all our muscles and the neurons that control them. The spinal cord contains certain motor programs for the generation of coordinated movements and that these programs are accessed, executed, and modified by descending commands from the brain. Motor control is divided into two parts: y the spinal cord s command and control of coordinated muscle contraction y the brain s command and control of the motor program in the spinal cord. The muscles in the body can be described according to two broad categories: y smooth: lines the digestive tract, arteries and related structures, plays a role in peristalsis and the control of blood pressure and blood flow. Innervated by nerve fibers from the ans y striated there are two types of striated muscles: cardiac muscle is the heart muscle. contracts rhythmically innervations of the heart from the ans functions to accelerate or slow down the heart rate: skeletal muscle.

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