Basal Ganglia

Question 1

Two main feedback systems for refining motor system output?

Answer 1

1. BG

2. cerebellum

Question 2

Motor loop roles

Answer 2

movement selection and action 
regulate contraction 
force 
multi-joint moves 
sequencing

Question 3

BG motor circuit output works through these 3 routes

Answer 3

motor thalamus
Pedunculopontine nucleus
Midbrain locomotor region

Question 4

The three routes control what actions?

Answer 4

1. MNs to muscules for voluntary moves
2. STG
3. MNs to postural/girdle muscles