PSYCH 454 Study Guide - Midterm Guide: Regular Graph, Smallworld, Subthalamic Nucleus

• School: UW-Madison
• Department: Psychology
• Course: PSYCH 454
• Professor: Yuri B.Saalmann

Document Summary

Increased striatal activity can disinhibit thalamus via direct pathway. Inhibiting thalamus reduces amount of information being transmitted to cerebral cortex. Activation/thought: cerebral cortex excites striatum increase activity in striatum increase inhibition on gp internal stops inhibition on thalamus thalamus sends info to cerebral cortex. Thalamus sends info to cerebral cortex increased stratium disinhibits thalamus. Takeaway: inhibit internal gp to stop inhibition (to activate) thalamus. Hyperdirect pathway : cerebral cortex subthalamic nucleus; excitatory. Subthalamic nucleus excites gp internal increase inhibition of thalamus inhibits transmission of information. Indirect pathway : striatum gp external subthalamic nucleus gp internal thalamus. @ rest: when gp external inhibits subthalamic nucleus, subthalamic no longer inhibits gp internal no thalamic activity (inhibited) @ activation of striatum: increased inhibition on gp reduces inhibition on subthalamic nucleus allows more information to be transmitted excites gp internal + increase inhibition of thalamus. Takeaway: when increased activity in striatum direct pathway activate thalamus. Cerebellum: automatic execution during/after skill learning (motor + cognitive)