External capsule (brain)

…The basal ganglia are divided into the caudate nucleus, lentiform nucleus (putamen and globus pallidus), amygdala, and claustrum, of which the lentiform nucleus is completely enclosed by the cerebral medulla. The medulla that surrounds the lentiform nucleus from the outside is called the external capsule, and the one that surrounds it from the inside is called the internal capsule. All projection pathways, such as the corticothalamic tract, thalamocortical tract, corticopontine tract, and pyramidal tract, pass through the internal capsule. …

*Some of the terminology that mentions "external capsule (brain)" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…大脳基底核は尾状核，レンズ核(被殻と淡蒼球)，扁桃体，前障に区別され，このうちレンズ核は完全に大脳髄質に包まれる。レンズ核を外側から包む髄質を外包，内側から包むのを内包と呼ぶ。皮質視床路，視床皮質路，皮質橋核路，錐体路などの投射性伝導路はすべてこの内包を通る。…

※「外包（脳）」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報