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Internal capsule

Recommended video: Horizontal section of the brain [26:37]
Horizontal sections of the brain at the levels of the genu of the corpus callosum and the habenula.

The internal capsule is a white matter structure of the brain. It is located in the inferomedial part of each cerebral hemisphere. More specifically, it is situated lateral to the thalamus and caudate nucleus, and medial to the lentiform nucleus.

The internal capsule can be divided into several parts: anterior limb, genu, posterior limb, retrolenticular segment, and sublenticular segment.

It is mainly composed of myelinated nerve fibers of ascending and descending tracts of the central nervous system. These tracts mainly connect the cerebral cortex with the subcortical structures, brainstem and spinal cord.

Terminology English: Internal capsule
Latin: Capsula interna
Definition White matter structure in the inferomedial portion of the cerebral hemisphere.
Divisions Anterior limb, genu, posterior limb, retrolenticular segment, and sublenticular segment.
Function Connections between cerebral cortex and subcortical structures, brainstem and spinal cord. 

Explore the structure of the internal capsule seen through the horizontal section of the brain with the following study unit!

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