PSYC 251 Lecture Notes - Lecture 17: Efference Copy, Purkinje Cell, Motor Coordination
23 Feb 2016
School
Department
Course
Professor
Document Summary
Cytoarchitecture of cerebellum: has many of the same kind and same (cid:1) amount of cells. Half of the neurons in the brain are granule cells, which are found in the cerebellum. Their axons run up from where they are placed in the lower levels of (cid:1) the cerebellum cortex into the surface levels of the cerebellum (photo in slides) Runs parallel through the cerebellum cortex that are called parallel fibres. (cid:1) Purkinje cells have many, many dendrites (green photo in slides) Receive about 200,000 inputs at any given time. Dendritive layer runs up into the surface layer (dendrites pointing up) with parallel fibres running horizontally. Provides the basis upon which the cerebellum can learn all the minute motor actions we use. Two things happen simultaneously: the signal in the spinal cord is used (cid:1) Motor coordination and cerebellum: a motor command is generated in the primary motor cortex (represents where and when movement occurs).
