PSYC 3251 Lecture 5: Motor Systems
23 Mar 2017
School
Department
Course
Professor
Document Summary
Cortex and motor control: posterior parietal cortex. Integrates visual info for initiation of planned movements: provides sensory info to prefrontal cortex, direct route prompts primary motor cortex to execute automatic movements. Indirect route prompts movements requiring conscious control through temporal cortex: prefrontal cortex, generates plans for movement. Info travels to premotor cortex: premotor cortex. Corticospinal tract (^: primary pathway for production of voluntary movement, 85% of fibers from pyramid cross and continue as lateral corticospinal tract, pyramind, corticospinal fibers forming prominent fiber bundle on ventral surface of medulla. Rubrospinal pathway: secondary lateral descending pathway for voluntary limb movement control, relatively small in humans, important in lower order animals with less developed corticospinal. Brainstem and motor control: controls posture and balance, controls ans: eating, drinking, and sex. Cerebellum and motor control: plays modulatory role in coordination and voluntary movement, evaluates differences between intention (relayed from cortex) and action (relayed from sc, deep cerebellar nuclei.
