PSY-B - Psychology PSY-B 320 Lecture Notes - Lecture 26: Prosthesis, Michael Graziano, Premotor Cortex
21 Mar 2017
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How does the nervous system respond to stimulation and produce. Hierarchy of movement control: major components of the motor system: Forebrain: conscious control of movement (planning and initiating) Spinal cord: more automatic movements: with impaired brainstem or spinal-cord function, the forebrain can imagine movements but can no longer produce them, other regions of the motor system: Subcortical basal ganglia helps to produce the appropriate amount of force for grasping. The cerebellum helps to regulate the timing and accuracy of movement. Movements must be performed as motor sequences, with one sequence held in readiness while an ongoing sequence is being completed. After we act, we wait for feedback about how well the action has succeeded, then we make the next movement accordingly. As one sequence is being executed, the next sequence is being prepared so that it can follow the first smoothly. Initiating a motor sequence: motor sequences, frontal lobes. Movement modules preprogrammed by the brain and produced as a unit.
