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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.
There are three types of muscles: skeletal, smooth, and cardiac . Skeletal muscle, attached to bones, is responsible for skeletal movements. These muscles are under conscious or voluntary control. These muscle. fibers are striated (having transverse streaks when seen under.