Basal Ganglia Flashcards

1
Q

Caudate nucleus + putamen

A

Striatum (striped appearance)

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2
Q

Nucleus accumbens alternate name

A

Ventral striatum

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3
Q

Putamen + globus pallidus

A

Lentiform nucleus

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4
Q

What is the ansa lenticularis

A

Outflow from globus pallidus; GABA-ergic projection to thalamus

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5
Q

What type of project (ex/in) is the Striatum to the GPi?

A

Inhbitory

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6
Q

What receptors on the Striatum do SN DA bind in the direct pathway?

A

D1 (excitatory)

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7
Q

What is the role of the STN in the indirect pathway

A

Excites the inhibitory neuron from the GPi to the thalamus, resulting in more inhibition

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8
Q

Which DA receptors do SN DA bind in the indirect pathway

A

D2; inhibits excitatory interneuron, decreasing the activation of the inhibitory projection from the striatum to the GPe

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9
Q

Goal of indirect pathway

A

Inhibit competing movements

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10
Q

Goal of direct pathway

A

Facilitate target-oriented movements

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11
Q

Describe blood supply to basal ganglia

A
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12
Q

Nucleus accumbens is the fusion of ___

A

Head of caudate and putamen

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13
Q

Where is the Substantia nigra located

A

Rostral midbrain – dark appearance

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14
Q

Which 2 fibre tracts form the thalamic fasciculus?

A

1) lenticular fasciculus and ansa lenticularis (GPi)

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15
Q

Which fibres travel in the subthalamic fasciculus

A

1) inhibitory projections from GPe to STN; excitatory projections from STN to GPi

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16
Q

The anterior choroidal arteries branch off of which main artery?

A

Internal carotid (along with MCA)

17
Q

Which BG structures are supplied by anterior choroidal artery?

A

1) Tail of caudate; 2) Posterior portions of GP and Putamen

18
Q

Which BG structures are supplied by the ACA

A

Branches penetrate to head of the caudate and anterior part of Putamen and GP (opposite of anterior choroidal arteries)

19
Q

Which BG structures are supplied by the MCA?

A

Branches supply putamen and globus pallidus (middle portions) and the BODY of the caudate nucleus

20
Q

Which BG structures are supplied by the PCA and posterior communicating artery?

A

Entire thalamus (deep branches); SN, STN, posterior caudate

21
Q
A