QuestionSBA
QuestionChoice
Incorrect. The arrow points to the posterior limb of the internal capsule. The cerebellar peduncles attach the cerebellum to the midbrain, pons, and medulla, and do not consist of corticospinal fibres.
10009217
c
Cerebellar peduncle
QuestionChoice
Incorrect. The arrow points to the posterior limb of the internal capsule. The medullary pyramids do consist of corticospinal fibres originating from the primary motor cortex, however it is an immediate continuation of the cerebral peduncles of the midbrain.
10009216
b
Pyramid
QuestionChoice
Incorrect. The arrow points to the posterior limb of the internal capsule. The dorsal column is part of the ascending dorsal column-medial lemniscal pathway in the spinal cord, transmitting sensory information via first order neurones to the medulla oblongata. Third order sensory neurones originating from the ventral posterolateral nucleus of the thalamus and are immediately continuous with the internal capsule to reach the primary somatosensory cortex.
10009219
e
Dorsal column
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. The corticospinal fibres of the internal capsule are continuous with the cerebral peduncles in the midbrain and then emerge as the pyramids in the ventral medulla, consisting of corticospinal fibres only.
10009215
a
Cerebral peduncle
QuestionChoice
Incorrect. The arrow points to the posterior limb of the internal capsule. The medial lemniscus is part of the ascending dorsal column-medial lemniscal pathway in the spinal cord, transmitting sensory information via second order neurones to the ventral posterolateral nucleus of the thalamus. Third order sensory neurones originating from here and are immediately continuous with the internal capsule to reach the primary somatosensory cortex.
10009218
d
Medial lemniscus
Concept
Chapter
2693
5321
Corticospinal tract
Topic
196
Neuroanatomy
14390
Picture
1750
45 - Corticospinal tract (posterior limb of internal capsule).png
images/wyxqf6nj1682950682274.jpg
images/wyxqf6nj1682950682274_256.jpg
images/wyxqf6nj1682950682274_512.jpg
4xgOHYT3d3eJd4h5dnd3eAh2h3BX
Topic
196
Neuroanatomy
The labelled structure contains fibres that are immediately continuous with which of the following structures in the midbrain?

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a