|Brain: Lentiform nucleus|
|Two views of a model of the striatum: A, lateral aspect; B, mesal aspect.|
|Gray's||subject #189 834|
The lentiform nucleus or lenticular nucleus describes the putamen and the globus pallidus within the basal ganglia. It is a large, cone-shaped mass of gray matter just lateral to the internal capsule.
Sections and size
When divided horizontally, it exhibits, to some extent, the appearance of a biconvex lens, while a coronal section of its central part presents a somewhat triangular outline.
It is shorter than the caudate nucleus and does not extend as far forward.
In a coronal section through the middle of the lentiform nucleus, two medullary laminæ are seen dividing it into three parts.
The lateral and largest part is of a reddish color, and is known as the putamen, while the medial and intermediate are of a yellowish tint, and together constitute the globus pallidus; all three are marked by fine radiating white fibers, which are most distinct in the putamen.
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