Basal Ganglia

Question 1

What are the three areas of the basal ganglia?

Answer 1

Caudate, putamen, globus pallidus

Question 2

What is the name for the caudate and putamen?

Answer 2

Corpus striatum

Question 3

What’s the name for the putamen and globus pallidus?

Answer 3

Lentiform nucleus

Question 4

What are the three motor functions of the basal ganglia?

Answer 4

Initiation and maintenance. Inhibit unnecessary and antagonist movement. Switch motor programs.

Question 5

What is the internal capsule?

Answer 5

White matter structure. Separated lentiform nucleus from caudate and thalamus

Question 6

What is the purpose of the globus pallidus?

Answer 6

Output to thalamus

GPe between other nuclei and GP

Question 7

Main blood supply to basal ganglia?

Answer 7

MCA

Question 8

What’s the corticostriatal pathway?

Answer 8

Cerebral cortex-> caudate and putamen

Question 9

Nigrostriatal pathway?

Answer 9

SNPC and midbrain input to caudate and putamen

Question 10

What type of neurones in the corpus striatum?

Answer 10

Medium spiny 75%

Question 11

What sort of input from
Cortex
SNPC
local circuit

Answer 11

Glutamatergic
Dopaminergic
GABAergic

Question 12

What is the output of the corpus striatum?

Answer 12

SNPR and GP

Question 13

Subthalamic nucleus?

Answer 13

Input: GPe and cortex
Output: GPi and SNPR

Question 14

VAVL thalamic nuclear complex?

Answer 14

Major outflow site. Input from GPi

Projects to motor areas of cerebral cortex

Question 15

When does the direct pathway become active?

Answer 15

When there is a change of motor programme