Telencephalon

 

 

This is the most rostral part of the brain. It has the following parts

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1.              Cerebral cortex

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2.              Cerebral ‘medulla’. This forms the fibers which criss cross and interconnect the telencephalon with other levels of the neuraxis. We have association, projection and commissural fibers. Examples include the corona radiata, the corpus callosum, which joins the cerebral cortex of one side of the brain to the other.


 
Coronal section through fixed brain at level of upper brain stem: 1 cortex 2 caudate nucleus 3 cerebral 'medulla' 4 corpus callosum 5 cingulate gyrus 6 fornix column 7 thalamus 8 internal capsule 9 lentiform nucleus 10 extreme capsule 11 claustrum 12 external capsule 13 insular cortex 14 3rd ventricle

 
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3.              The lowermost structure is called the basal ganglia, because it is at the basal level of the cerebrum (telencephalon). It consists of two structures

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a.              Corpus striatum

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b.              Amygdaloid nuclear complex (amygdala, amygdaloid body etc). The amygdala is very much related to the paleocortex more than the basal ganglia. Hence sometimes the term basal ganglia is synonymous with corpus striatum.

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