Exploration of the cerebellum from above and behind

Medial lemniscus within medulla and pons

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Image #25-2
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Exploration of the cerebellum from above and behind
Medial lemniscus within medulla and pons
The medulla and pons have been dissected to a deeper level on the right side. The medial lemniscus can be traced from its origin in the decussation of the medial lemniscus (20) upward through the medulla as a vertical band near the midline (19). In the pons this band becomes flattened and displaced laterally and is interwoven with the transverse fibers of the trapezoid body (16) which cross the midline. Above this the lemniscus gradually comes to lie in a more lateral position (13).
1 . Median eminence rhomboid fossa
2 . Dentate nucleus
3 . Facial colliculus
4 . Area acustica
5 . Sulcus limitans
6 . Striae medullares
7 . Medial longitudinal fasciculus
8 . Taenia fourth ventricle
9 . Wing of gray matter
10 . Clava
11 . Obex
12 . Lateral lemniscus
13 . Medial lemniscus
14 . Brachium pontis (middle cerebellar peduncle) (cut across)
15 . Trigeminal nerve (V)
16 . Trapezoid body
17 . Facial nerve (VII)
18 . Spinal trigeminal tract
19 . medial lemniscus
20 . Decussation of lemniscus (upper pointer) and cuneate tubercle