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Serial transverse sections of the brain stem

Pons.

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Image #30-5
Bassett ImageDiagram Image
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Serial transverse sections of the brain stem
Pons.
A section 3.5 mm. thick has been removed. On the right side the cut passes through the fibers of the fifth nerve as they leave the pons. No cranial nerve nucleus, except the mesencephalic root of the fifth nerve, is present in this region of the brain stem. The nucleus of the lateral lemniscus (13) lies in the midst of the fibers of the lemniscus.
1 . Anterior medullary velum (lingula attached to its upper surface)
2 . Fourth ventricle
3 . Medial longitudinal fasciculus
4 . Raphe
5 . Brachium pontis (middle cerebellar peduncle)
6 . Deep pontine fibers
7 . Longitudinal fasciculus
8 . Superficial pontine fibers
9 . Longitudinal fissure (cerebral)
10 . Brachium conjunctivum (superior cerebellar peduncle)
11 . Descending root (mesencephalic) of trigeminal nerve (V)
12 . Central tegmental tract
13 . Lateral lemniscus and nucleus
14 . Medial lemniscus
15 . Trigeminal nerve (V)
16 . Temporal lobe