BIOL 3755 Chapter Notes - Chapter 10: Afferent Nerve Fiber, Motor Neuron, Motor Program
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Voluntary and involuntary actions: voluntary movement ~ actions where movement is accompanied by conscious awareness of what we are doing and why we do it or our attention is directed toward action or its purpose. Involuntary ~ describes actions that do not have these characteristics: unconscious, automatic, and reflex, most behavior is neither purely voluntary nor purely involuntary but has elements of both. 10. 2 local control of motor neurons: local control systems are relay points for instructions to motor neurons from centers higher in motor control hierarchy. Interneurons: comprise about 90% of spinal cord neurons. Important elements of local level of motor control hierarchy, integrating inputs not only from higher centers and peripheral receptors but from other interneurons as well. Local afferent input: afferent fibers carry info from sensory receptors located in three places. In other muscles, such as those with antagonistic actions. 10. 3 brain motor centers and descending pathways they control. Inhibitors of enzymes that metabolize dopamine at synapses.
