GE CLST 73B Lecture Notes - Lecture 10: Supplementary Motor Area, Primary Motor Cortex, Premotor Cortex

• School: UCLA
• Department: General Education Clusters
• Course: GE CLST 73B
• Professor: Chandler, S.H.

Document Summary

Voluntary movement involves the cortex, cerebellum, basal ganglia but not so much cpg, reflexes. Descending motor pathways stop functioning because they are blocked - locked in syndrome. Julia had an aneurysm (weakness off a blood vessel wall that can break causing blood to leak out) so blood filled her brain and killed her brain tissue. This occurred in the brainstem around the pons. The descending pathways couldn"t talk to spinal cord or the muscles. Julia could move eyes and head a bit because it was above where the aneurysm had occurred. Stuff on the top, has very specific function. Primary motor cortex (m1) - localized to the precentral gyrus (toward the frontal cortex) Premotor cortex and supplementary motor cortex feed into m1 - provide programs for the motor cortex to execute. From the cortex there is a pathway : corticospinal tract. Neurons of origin and it sends it axon going elsewhere - goes from cortex to spinal cord.