Basal ganglia

Basal Ganglia
Introduction :



Basal
ganglia the scattered
of gray
matter
submerged
°
are masses


subcortical
in
of substance cerebral
hemisphere .




. It is a
part of extrapyramidal system .




Components of Basal ganglia :



o


primary components
3 :



striatum
in
Corpus
dis substantia
nigra
Subthalamic nucleus
Iii is
of lays
.




Corpus striatum
of
: -


It in
matter situated at a mass


the base
gray
of cerebral
hemispheres in close relation to thalamus
.




•


Corpus striatum is completely divided into two parts by internal
capsule :
ii. Caudate nucleus
cii, lenticular nucleus


cis Caudate Nucleus Elongated arched
gray
-




"
" Mars

head
,

gt has tail
portion
a & a .




ciii lenticular Nucleus Hedge shaped man

gray
- - .




%
Outer
Two
portions
( at
putamen
lbs Inner
globus pallidus
substantia
Nigra : -
It is situated below red nucleus .




• It is made
up of large pigmented and small non -




pigmented .




o


Pigment contains
high quantity of Fe .




Subthalamic Nucleus gt situated lateral to red
of lays : -
is

nucleus & dorsal to substantia
nigra
.