01:146:245 Lecture Notes - Lecture 19: Anterior Grey Column, Vestibular Nuclei, Superior Colliculus

• School: Rutgers University
• Department: Cell Biology and Neuroscience
• Course: 01:146:245
• Professor: Professor Wilhelms

Document Summary

~central pattern generators spinal cord circuits for rhythmic things like walking. ~brain initiates movement, but individual movements are controlled in spinal cord. ~oscillatory circuit that causes alternating flexion and extension. ~upper motor neurons their axons descend to interneurons which then affect lmn. ~there are different centers of upper motor neurons in brainstem/cortex. ~vestibular nucleus and reticular formation (both in brainstem) affect body position and posture. ~motor and premotor areas in frontal cortex are for planning precise movement. ~upper motor neurons in cortex can also descend to upper motor neurons in brainstem. ~finals targets for upper motor neurons are interneurons for lmn. ~somatotopic organization of lmn in ventral horn of spinal cord. ~the interneurons for spinal cord lmn are in intermediate zone between ventral and dorsal horns. ~the more medial interneurons synapse with medial lmn, involved more in posture. ~the more lateral interneurons synapse with lateral lmn. ~medial and lateral interneurons also have different pathways and functions.