Posterior median fissure

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Brain: Posterior median fissure
Latin	sulcus medianus posterior medullae oblongatae, fissura mediana posterior
Gray's	subject #187 767
Dorlands/Elsevier	s_28/12769164

The posterior median fissure (dorsal or dorsomedian fissure, or posterior median sulcus) is a narrow groove; and exists only in the closed part of the medulla oblongata; it becomes gradually shallower from below upward, and finally ends about the middle of the medulla oblongata, where the central canal expands into the cavity of the fourth ventricle.

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.