Basal ganglia Flashcards

1
Q

major functions of the basal ganglia

A
  1. modulate and refines cortical activity 2. recieves information from the cortex + several other sources 3. feeds information back to the cortex via the thalamus
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2
Q

Input nuclei

A
  1. recieves information 2. Neostriatum = Caudate nucleus + Putamen
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3
Q

Intrinsic nuclei

A
  1. recieves information from input nuclei for processing 2. External globus pallidus 3. Subthalamic nucleus 4. Pars compacta of substantia nigra
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4
Q

Caudate nucleus + Putamen

A

Neotriatum

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5
Q

Caudate nucleus + Putamen

A

Nucleus Accumbens

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6
Q

Caudate nucleus

A
  1. found on the lateral wall of the lateral ventricle 2. Internal capsule separates caudate nucleus from putamen
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7
Q

Lentiform nucleus

A
  1. globus pallidus 2. Putamen anatomically related but share no functional relationship
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8
Q

putamen

A
  1. lateral aspect of lentiform nucleus 2. concave inner surface lies next to the exterior of Globus Pallidus externa 3. lateral to the putamen is the external capsule
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9
Q

substantia nigra

A
  1. seen in cuts through the midbrain 2. dark appearance due to neuromelanin present in the cells
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10
Q

subthalamic nucleus

A
  1. inferior to the thalamus 2. right above substantia nigra
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11
Q

Name the functions of the basal gangia

A
  1. feedback mechanism to the cerebral cortex to refine cortical activity 2. reduces excitatory input and refines movements by preventing involuntary movements
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12
Q

Main arterial supply of basal ganglia

A
  1. mainly comes from middle cerebral artery 2. main artery is lenticulostriate artery and provides most of the circulation to striatum
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13
Q

arterial supply of the substantia nigra and subthalamic nucelsu

A
  1. more posterior 2. recieve branches from posterior cerebral and posterior communicating arteries
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14
Q

describe the anatomy of the basal ganglia

A
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15
Q
A
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