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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.
Vertebrate muscles: striated vs. smooth; voluntary vs. involuntary; skeletal vs. non-skeletal; Skeletal muscle (left) & Smooth muscle (right) Skeletal muscle = muscles attached to the skeleton that are striated & voluntary Non-skeletal muscle = muscles not attached to the skeleton; most are smooth & involuntary Vertebrate Muscles: