Median [Ventral] fissure
Fissura mediana [ventralis]
Definition
The median fissure is a deep longitudinal groove located along the ventral midline of the medulla oblongata. It separates the right and left medullary pyramids and continues caudally as the median ventral fissure of the spinal cord.
References
Evans HE, de Lahunta A. Millers anatomy of the dog, 4th edition, Elsevier Saunders, St Louis, 2012.