ANAT 321 Lecture Notes - Lecture 16: Cerebral Peduncle, Pontine Nuclei, Premotor Cortex

• School: McGill University
• Department: Anatomy & Cell Biology
• Course: ANAT 321
• Professor: David Ragsdale

Document Summary

Basal ganglia, motor cortex, and cerebellum all connected in loops, critically involved in ability to execute smooth, goal-directed voluntary movements. Cerebellum is a cortex (thin sheet), but subcortical. Basic architecture of cerebral cortex is same (6 layers) w/; cerebellum cortex is exactly the same throughout, same computation everywhere, 5 neurons. But has diff functions throughout; same computations, but on diff inputs & make diff outputs. Receives massive sensory inputs (especially somatosensory) & inputs from movement systems (motor & premotor cortex) information about motor commands & senses - compare intensions w/actual action & make adjustments. Outputs: motor cortex & motor regions in brainstem. Procedural memory: practice, get better at it motor learning. Almost all of cerebellum"s neurons are one type; as many cerebellar granular cells as sum of all other neurons in brain. But wrinkles anatomically diff from cortex; regular folds oriented in same direction. Major folds have names, don"t need to know.