Physiology 1020 Lecture Notes - Lecture 6: Supplementary Motor Area, Primary Motor Cortex, Premotor Cortex
20 Dec 2015
School
Department
Course
Professor
Document Summary
Primary motor cortex: supplementary motor area, premotor area, primary motor cortex area, basal ganglia, spinal pathways, motor nerves (going to muscles, muscle receptors. Prefrontal cortex making the decision to move. Premotor cortex signal for movement passed here, and strategy for movement is developed here: people with damage in premotor cortex often cannot select the appropriate strategy to perform a given task appropriate. Developed sequence strategy from premotor cortex travels to supplementary cortex. Supplementary motor cortex programs motor sequences necessary: the more complex or repetitious the movement, the more the supplementary motor area is needed. People with lesions (damage) to supplementary cortex have difficulty orienting their hands and digits appropriately. Written program is sent to primary motor cortex. Located on the precentral gyrus in the frontal lobe. Activates neurons that eventually activate the appropriate muscles. Motor homunculus: very specific arrangement where a specific area of the motor cortex activates a particular muscle.
