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| Cranial Nerve III - Oculomotor Nerve | Page 1 of 2 |
Origin and Central Course
The fibers of the hypoglossal nerve originate from the hypoglossal nucleus located in the tegmentum of the medulla.
This long thin nucleus, which extends roughly the same length as the olive, gives rise to the hypoglossal trigone in the floor of the fourth ventricle:
Fibers leaving the hypoglossal nucleus travel ventrally just lateral to the medial lemniscus to emerge from the brainstem in the groove between the pyramid and the olive - the ventrolateral sulcus.
