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Flashcards in basal ganglia Deck (19)
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1

what does the basal ganglia consist of?

number of subcortical nuclei
grouping of these nuclei related to function rather than anatomy

2

what is the general function of the basal ganglia?

acts to modulate and refine cortical activity

3

what can the components be divided into?

- input nuclei
- output nuclei
- intrinsic nuclei
input nuclei receive info which is then relayed to intrinsic nuclei for processing and then passed to output nuclei

4

name the input nuceli

cudate nucleus and putamen (neostriatum)

5

name the intrinsic nuclei

- external globus pallidus
- subthalamic nucleus
- pars compacta of substantia nigra

6

name the output nuclei

- internal globus pallidus
- pars reticulata of substantia nigra

7

what happens at the most rostral aspect of the neostratum? what is it called?

caudate nucleus and putamen join together
termed nucleus accumbens

8

what is the globus pallidus divided in to?

- external (GPe)
- internal (GPi)
- functionally different

9

where does the subthalamic nucleus lie?

diencephalon

10

in the mesencephalon, what happens to the substantia nigra?

divided into:
- pars compacta (SNc)
- pars reticularis (SNr)

11

what is the caudate nucleus?

collection of gray matter on wall of lateral ventricles

12

during development, what separates the caudate nucleus from putamen?

descending white matter fibres
at this level known as internal capsule

13

what is the lentiform nucleus comprised of?

- globus pallidus
- putamen

14

what lies on the inner surface of the putamen?

most exterior of globus pallidus

15

what is the most internal structure of the putamen?

GPi

16

what can be found laterally to putamen?

external capsule

17

what is the appearance of the substantia nigra?

dark appearance due to neuromelanin

18

what are the functions of the basal ganglia?

- motor refinement
- modulating cognitive and emotional responses

19

what is the main arterial supply to the basal ganglia?

middle cerebral artery
continutation of internal carotid artery