Basal Ganglia Flashcards Preview

Brain and Behaviour > Basal Ganglia > Flashcards

Flashcards in Basal Ganglia Deck (15)
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1
Q

What nuclei make up the striatum?

A

Caudate nucleus + putamen

2
Q

What nuclei make up the pallidum?

A

Globus pallidus internus and externus + substantia nigra pars compacta

3
Q

What nuclei make up the lentiform nucleus?

A

Putamen + globus pallidus internus and externus

4
Q

What pathway does Parkinson’s affect?

A

Direct (excitatory) pathway

5
Q

What receptor does dopamine act on in the direct pathway?

A

D1 receptors in the striatum

6
Q

What does the direct pathway do?

A

Promote movement

7
Q

What does the indirect pathway do?

A

Reduces unwanted movement

8
Q

What pathway does Huntington’s affect?

A

Indirect (inhibitory) pathway

9
Q

What receptor does dopamine act on in the indirect pathway?

A

D2 receptors in the striatum

10
Q

What does the cortex do?

A

Excite striatum

11
Q

What does the striatum do?

A

In direct pathway, inhibits Globus Pallidus Internus + SNPR. In indirect pathway, inhibits globus pallidus externus.

12
Q

What does the Globus pallidus internus + SNPR do?

A

Inhibits thalamus

13
Q

What does thalamus ventral anterior/lateral nucleus do?

A

Excites cortex (via pre/supplemental motor)

14
Q

What does Globus pallidus externus do?

A

Inhibits Subthalamic nucleus

15
Q

What does subthalamic nucleus do?

A

Excites Globus pallidus internus + SNPR