QuestionSBA
QuestionChoice
Correct. The arrow points to the posterior limb of the internal capsule, which is a collection of white matter fibres, including corticospinal fibres which originate from the pyramidal neurones in layer V of the primary motor cortex. It separates the caudate and putamen nuclei in the basal ganglia, medial to the lentiform nucleus, becomes the cerebral peduncles in the midbrain, and emerges as the pyramids in the ventral medulla.
10009210
a
Internal capsule
QuestionChoice
Incorrect. The caudate nucleus is a region of grey matter within the basal ganglia on the lateral wall of the lateral ventricle. It is separated from the lentiform nucleus laterally by the internal capsule.
10009212
c
Caudate nucleus
QuestionChoice
Incorrect. The lentiform nucleus is a region of grey matter within the basal ganglia, comprising the globus pallidus (medially) and the putamen (laterally). It is found lateral to the internal capsule.
10009211
b
Lentiform nucleus
QuestionChoice
Incorrect. The external capsule is a collection of corticocortical association white matter fibres connecting one region of the cortex to another, located between the lentiform nucleus and the claustrum. It joins the internal capsule around the lentiform nucleus of the basal ganglia.
10009213
d
External capsule
QuestionChoice
Incorrect. The extreme capsule is a collection of association white matter fibres located between the subcortical claustrum and insular cortex. It joins the external capsule around the claustrum, which then joins the internal capsule.
10009214
e
Extreme capsule
Concept
Chapter
2693
5321
Corticospinal tract
Topic
196
Neuroanatomy
14389
Picture
1749
44 - Corticospinal tract (posterior limb of internal capsule).png
images/re7c0bu21682950679550.jpg
images/re7c0bu21682950679550_256.jpg
images/re7c0bu21682950679550_512.jpg
DhgOFQIIx4h3WJeId3d4dwh4h5Bo
Topic
196
Neuroanatomy
Identify the labelled structure.

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a