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Voluntary and Reflex Motor Physiology. The motor (efferent) division of the nervous system includes the somatic (voluntary) motor division and the autonomic. (involuntary) motor division. The somatic motor division involves voluntary or conscious movement of skeletal muscles.
The system includes all the neurons connected with muscles, skin and sense organs. The somatic nervous system consists of efferent nerves responsible for sending brain signals for muscle contraction.Examples: (1) Reflexive response-A reflex arc is an automatic reaction that allows an organism to protect itself when an imminent danger is perceived.he system includes all the neurons connected with muscles, skin and sense organs. The somatic nervous system consists of efferent nerves responsible for sending brain signals for muscle contraction.