Pallidum is precisely one cerebral place where there is a dramatic change between one afferent geometry and a completely different efferent one.

The globus pallidus (Latin for "pale globe") also known as paleostriatum, is a sub-cortical structure of the brain.

Region below paleostriatum primitivum posterior to anterior commissure: Subpallial amygdaloid area (PA/SpA)

The "striatum" and "external segment of the globus pallidus" in primates are called the "paleostriatum augmentatum" and "paleostriatum primitivum," respectively, in birds.