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25 Cards in this Set

  • Front
  • Back
I.
Basal Ganglia
A.
Subcortical group of gray matter nuclei
B.
Four distinct
1.
Striatum
a)
Overactivity due to lack of dopaminergic inhibition
(1)
Results in bradykinesia, an inability to initiate movements
b)
Corpus Striatum: collective name for
(1)
Caudate
(a)
Important to modulation of motor acts
(b)
Decreased activity correlated to OCD
(c)
Gatekeeper for motor system acts that are goal directed
(d)
When not functioning, OCD and Tourettes
(e)
Shrinks dramatically in Huntington’s disease
(2)
Putamen
2.
Pallidum
a)
Globus pallidus: 2 parts, internal and external
(a)
If damaged (carbon monoxide poisoning)dystonic posturing and flapping
3.
Substantia Nigra
a)
Presence of melanin makes it look black
b)
Two parts:
(1)
Functionally equivalent to Globus Pallidus interna
(2)
Degenerates in Parkinson’s
(a)
Rigidity, tremor, depression
4.
Subthalmic Nucleus
a)
Lesionsballistic movements