Brain Anatomy Introduction CLOSE

Sheep Brainstem — Ventral View

Ventral view of a sheep brainstem. The pyramids (p) emerge form the pons and run beside the midline along the ventral surface of the myelencephalon. Because they decussate (cross sides), pyramids disappear from the surface at the juncture with the spinal cord (asterisk). The trapezoid body (tr) and vestibulocochlear nerve (VII) are found in the rostral 25% of the medulla oblongata. The motor nucleus of the facial nerve (f) is located caudal to the trapezoid body. To return to the sheep image, click here. To see the equine, click here.

The pons and a stump of trigeminal nerve (V) are labeled.

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