Basal ganglia Flashcards
1
Q
major functions of the basal ganglia
A
- modulate and refines cortical activity 2. recieves information from the cortex + several other sources 3. feeds information back to the cortex via the thalamus
2
Q
Input nuclei
A
- recieves information 2. Neostriatum = Caudate nucleus + Putamen
3
Q
Intrinsic nuclei
A
- recieves information from input nuclei for processing 2. External globus pallidus 3. Subthalamic nucleus 4. Pars compacta of substantia nigra
4
Q
Caudate nucleus + Putamen
A
Neotriatum
5
Q
Caudate nucleus + Putamen
A
Nucleus Accumbens
6
Q
Caudate nucleus
A
- found on the lateral wall of the lateral ventricle 2. Internal capsule separates caudate nucleus from putamen
7
Q
Lentiform nucleus
A
- globus pallidus 2. Putamen anatomically related but share no functional relationship
8
Q
putamen
A
- 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
9
Q
substantia nigra
A
- seen in cuts through the midbrain 2. dark appearance due to neuromelanin present in the cells
10
Q
subthalamic nucleus
A
- inferior to the thalamus 2. right above substantia nigra
11
Q
Name the functions of the basal gangia
A
- feedback mechanism to the cerebral cortex to refine cortical activity 2. reduces excitatory input and refines movements by preventing involuntary movements
12
Q
Main arterial supply of basal ganglia
A
- mainly comes from middle cerebral artery 2. main artery is lenticulostriate artery and provides most of the circulation to striatum
13
Q
arterial supply of the substantia nigra and subthalamic nucelsu
A
- more posterior 2. recieve branches from posterior cerebral and posterior communicating arteries
14
Q
describe the anatomy of the basal ganglia
A
15
Q
A
