title: Posterior median sulcus of medulla oblongata
text: # Posterior median sulcus of medulla oblongata
  
  The posterior median sulcus of medulla oblongata (or posterior median fissure or dorsal 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.
  
  ## Additional images
  
  * Fourth ventricle. Posterioe view.Deep dissection.
  