ANP 1106 Lecture Notes - Lecture 9: Periaqueductal Gray, Subthalamic Nucleus, Cerebral Peduncle

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Joanne Savory

Document Summary

Basal nuclei are subcortical nuclei (caudate nucleus, putamen, globes pallidus) deep within the cerebral white matter. The caudate nucleus and the putamen form the striatum. It is associated with subthalamic nuclei (diencephalon) and substantia nigra (midbrain). The basal nuclei re- ceives input from the entire cerebral cortex and other subcortical nuclei as well as each other. They project to premotor and prefrontal cortices to influence muscle movements directed by the primary motor cortex, because they have no direct access to motor pathways. If damaged, there is a likelihood of disturbances in posture and muscle tone, as well as pres- ence in involuntary movements (tremors) and slowness of movements (ie. parkinson"s) The thalamus is the relay station for information coming into the cerebral cortex. It sorts, edits and relays ascending input like impulses from the hypothalamus (regulation of emotion and vis- ceral function), cerebellum and basal nuclei (help direct motor cortices) and impulses for memo- ry or sensory integration.