PSY 320 Lecture Notes - Lecture 13: Globus Pallidus, Muscle Tone, Basal Ganglia
Document Summary
Test friday: dorsolateral prefrontal cortex- processing, deciding information , sensorimotor system. Preparing/programming specific movements: primary motor cortex. All cumulates here: stimulation during brain surgery is context dependent, stimulation in primary motor strip- information descends, two divisions of the dorsolateral motor pathway. Dorsolateral corticospinal tract- controls movement of fingers and hands. Dorsolateral corticorubrospinal tract- controls the movement of the forearms, hands (but not fingers) and feet. Descends through the red nucleus: two divisions of the ventromedial motor pathway- Control of posture and whole body movement- Move(cid:373)e(cid:374)ts of (cid:271)ody"s tru(cid:374)k a(cid:374)d (cid:271)ilateral (cid:373)ove(cid:373)e(cid:374)ts su(cid:272)h as sta(cid:374)di(cid:374)g, (cid:271)e(cid:374)di(cid:374)g, walking and sitting down: sensorimotor system. Commands then leaves cortex and may ultimately lead to motor changes. Subcortical processing can modulate commands and actually respond as motor programs without much cortical involvement. Ex: cerebellum, basal ganglia (caudate, substantia nigra etc. ) Basal ganglia gives information about what to do. Being able to reach out and grab something.
