External capsule

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External capsule
Gray717-emphasizing-external capsule.png
Horizontal section of right cerebral hemisphere. (external capsule shown in orange, indicated by red arrow.)
Deep dissection of cortex and brain-stem. (External capsule visible at center.)
Latin capsula externa
NeuroNames hier-235
NeuroLex ID External capsule
TA A14.1.09.551
FMA 61959
Anatomical terms of neuroanatomy

The external capsule is a series of white matter fiber tracts in the brain. These fibers run between the most lateral (toward the side of the head) segment of the lentiform nucleus and the claustrum.

The white matter of the external capsule contains fibers known as corticocortical association fibers. These fibers are responsible for connecting the cerebral cortex to another cortical area. The capsule itself appears as a thin white sheet of white matter.[1]

The external capsule is a route for cholinergic fibers from the basal forebrain to the cerebral cortex.

The external capsule eventually joins the internal capsule around the lentiform nucleus.

Additional images[edit]


  1. ^ Powell, Meshell (13 January 2014). "What Is the External Capsule?". wiseGEEK. Conjecture Corporation. Retrieved 22 Jan 2014. 

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