external capsule

(redirected from capsula externa)
Also found in: Medical.

external capsule

n.
A thin layer of white substance in the brain that separates the claustrum from the lentiform nucleus.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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1a demonstrates a right frontoparietal, right basal ganglia and left anterior capsula externa hypodense lesions without significant mass effect and no contrast enhancement (Fig.