external capsule of telencephalon
external capsule of telencephalon
Any of the series of white matter fiber tracts in the brain that run between the most lateral segment of the lentiform nucleus and the claustrum; the white matter of the external capsule contains fibers known as corticocortical association fibers which are responsible for connecting the cerebral cortex to another cortical area; the capsule appears as a thin white sheet of white matter and provides a route for cholinergic fibers from the basal forebrain to the cerebral cortex; it eventually joins the internal capsule around the lentiform nucleus.