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Basal Ganglia and Cerebellum > Corpus striatum > Flashcards

Corpus striatum Flashcards

1
Q

What separates the head of caudate nucleus and the lentiform nucleus

A

Ant limb of internal capsule which is a white matter tract containing projection fibers

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2
Q

Lentiform nucleus

A

Putamen

Globus pallidus

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3
Q

What separates lentiform nucleus and thalamus

A

Post limb internal capsule

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4
Q

What surrounds the putamen

A

External capsule which is white matter

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5
Q

What surrounds the external capsule

A

The claustram: thin band of grey matter

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6
Q

What surrounds the claustrum

A

Extreme capsule of white matter

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7
Q

What surrounds extreme capsule

A

Grey matter called insular lobe, very very hidden

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8
Q

Head of caudate

A

Lateral wall of ant horn of lat ventricle

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9
Q

Tail of caudate

A

Roof of inf horn lat vent

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10
Q

Putamen

A

Lat to int capsule and globus pallidus

Claustrum and insula are lat to putamen

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11
Q

Globus pallidus

A

Medial to putamen and int capsule

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12
Q

Connections of striatum

A

Afferents:
1. Corticostriatal- cerebral cortex regions and striatum, IPSI and CONTRAlateral, glutamate and excit.

  1. Thalamocortical- intralam. Nuclei, glut. And excit. (Thalamus and cortex with striatum)
  2. Nigrostriatal- pars compacta of substantia niagra, dopamine
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13
Q

Major output of corpus striatum

A

Globus pallidus

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14
Q

Corpus striatum

A

Caudate nucleus
Putamen
Globus pallidus

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15
Q

Striatum

A

Caudate nucleus

Putamen

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16
Q

Striatal efferents

A

To g pallidus and substantia nigra
Striatopallidal
Striatonigral

17
Q

Pallidal afferents

A

Connections TO G Pallidus

From striatum and
subthalamic nucleus

Inhibitory

Striatopallidal
Subthalamopallidal ( in fasciculus)

Terminate on both divisions

18
Q

Pallidal efferents

A

Pallidothalamic
Info goes from ext gp to thalamus via subthalamic fasciculus

Inhibitory via GABA
TO THALAMUS or midbrain

19
Q

Ansa lenticularis

A

Int GP
More rostral (inferomedial aspect of int capsule)
To thalamus

20
Q

Lenticular fasciculus

A

IGP to thalamus

21
Q

Thalamic fasciculus

A

Both ansa lenticularis and lenticular fasciculus

22
Q

Cerebral aqueduct

A

Connects 3rd and 4th ventricle

23
Q

Substantia niagra

A

Bilateral nucleus
Midbrain
Ventral (below) c. Aqueduct
Dorsal (above) crus cerebri (tract from brain stem to cortex, white matter)

Black: neuromelanin (thought to protect cells)

24
Q

Nuclei of substantia niagra

A

Pars compacta: closest to red nucleus (more dorsal)

Pars reticulata: more ventral, closest to curs cerebri

25
Q

Huntington’s disease

A

Neurodegen.
Neurons die

AFFECTS CORPUS STRIATUM

Basal Ganglia and Cerebellum (1 decks)

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