Basal Ganglia

Question 1

4 parts of BG

Answer 1

Striatum
Globus Pallidus
Subthalamic Nucleus
Substantia Nigra

Question 2

Lentiform nucleus refers to:

Answer 2

Putamen and globus pallidus

Question 3

3 circuits in BG

Answer 3

Oculomotor
Motor
Limbic

Question 4

Oculomotor circuit originates ____ and projects to ____

Answer 4

Frontal and supplementary motor eye fields –> Caudate

Question 5

Function of oculomotor circuit

Answer 5

Saccadic Eye Movements

Question 6

Motor loop pathway

Answer 6

Precentral motor and postcenral somatosensory areas –> Excites putamen –> inhibits globus pallidus –> activates vental lateral nucleus and supplemental motor area

Question 7

Function of Motor Loop

Answer 7

Boosts activity in ventral lateral nucleus and supplmental motor area
Scale amplitude and velocity of movements
Reinforces selected patterns/suppresses conflicting patterns to prepare for movement

Question 8

Limbic Circuit Pathway

Answer 8

Prefrontal and limbic areas of cortex –> BG & Prefrontal cortex

Question 9

Function of limbic circuit

Answer 9

Organize behaviors (executive function)
Procedural learning