The “putamen” (botanical term for the stony core of a fruit like the peach) is a nucleus located deep within the brain, forming a part of the basal ganglia.
Striatum/neostriatum = caudate nucleus (nucleus caudatus) + putamen
Lentiform nucleus = putamen + globus pallidus
Corpus striatum (dorsal division) = caudate nucleus + putamen + globus pallidus
The putamen surrounds the globus pallidus superolaterally. Anatomically, along with the globus pallidus, it forms the lentiform nucleus. Functionally, along with the caudate nucleus, it belongs to the neostriatum. Thin bundles of axons called Wilson’s pencils course the putamen as if radiating from the globus pallidus, giving it a striated appearance. The putamen is nourished by lenticulostriate arteries (penetrating branches of anterior and middle cerebral arteries).
Lateral – external capsule, claustrum, extreme capsule, insular cortex.
Medial – a sheet of myelinated nerve fibers...