Week 11

Question 1

Basal ganglia

Answer 1

Group of nuclei in the base of the cerebral hemispheres
-necessary for the initiation, control, and cessation of muscle activity

Question 2

What are the 4 cortico-cortico circuits the basal ganglia is involved with

Answer 2

Skeletomotor- involved in control of voluntary movements, balance and gait
Oculomotor- eye movement control
Limbic- emotional control and motivation
Prefrontal- planning, persistence, memory, spatial ability

Question 3

Function of basal ganglia

Answer 3

Critical for initiating movement, and regulating movement force

Question 4

Direct route (D1)

Answer 4

Net cortical excitation (reduced inhibition from GPi)
-movement initiation and maintenance

Question 5

Indirect route (D2)

Answer 5

Net cortical inhibition (increases inhibition from GPi)
-stopping and stillness