7 Psych 15 Movement

7 Psych 15 Movement - Movement I Behavior is overt movement...

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Movement I. Behavior is overt movement A. Reflexive (e.g., rooting, withdrawal, Babinski) B. Rhythmic (e.g., walking; central pattern generators ) C. Voluntary (e.g., throwing a ball; depends on feedback )
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II. The Neuromuscular Unit A. Muscle-- skeletal, smooth or cardiac ; flexors v. extensors; fast or slow B. Motor neuron-- neuromuscular junction , acetylcholine C. Proprioceptors a. muscle spindle b. Golgi tendon organ D. Stretch reflex
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Sherrington studied reflexes and hypothesized the synapse
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III. Spinal Cord Activity is under Descending Control A. Dorsolateral tract originates in and around primary motor cortex and the red nucleus B. Ventromedial tract originates in and around primary motor cortex and the vestibular nucleus
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IV. Cortical Areas Controlling Movement A. Primary motor cortex --active during movement B. Prefrontal and premotor cortex -- planning and preparing for movement C. Supplemental motor cortex -- preparation for serial movements D. Posterior parietal cortex --converts perception into action
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V. The Cerebellum A. Careful timing of behavior at
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