Basal Ganglia Flashcards
Important role of basal ganglia
Controls posture and voluntary movements
These structures are seen in the cerebral hemispheres
Corpus striatum
Amygdaloid nucleus
Claustrum
Corpus striatum has an internal capsule that divides into
Caudate nucleus
Lentiform nucleus
A large C shaped mass of gray matter, closely related to lateral ventricle and lies lateral to thalamus
Caudate nucleus
This terminates anteriorly in the amygdaloid nucleus
Tail of caudate nucleus
Wedge shaped mass of gray matter
Lentiform nucleus
What is the larger darker lateral portion of the white matter
Putamen
Inner lighter portion of the white matter
Globus Pallidus
What causes the paleness of the Globus Pallidus
High concentration of myelinated nerve fibers
It can influence the body’s response to environmental change
Amygdaloid nucleus
They form the site for receiving input to the basal nuclei
Caudate nucleus
Putamen
Forms the major site from which the output leaves the basal nuclei
Globus Pallidus
This disorder has a positive and abnormal movement
Hyperkinetic disorder
Is negative tremor, felt as resistance to passive movements
Plastic rigidity
Positive tremor, muscle resistance is overcome as a series of jerks
Cogwheel rigidity
