Anterior median fissure of the medulla oblongata
This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (March 2016) (Learn how and when to remove this template message)
|Anterior median fissure of the medulla oblongata|
Section of the medulla oblongata at about the middle of the olive. (Anterior median fissure labeled at bottom center.)
|Latin||fissura mediana anterior medullae oblongatae|
|Anatomical terms of neuroanatomy|
The anterior median fissure (ventral or ventromedian fissure) contains a fold of pia mater, and extends along the entire length of the medulla oblongata: It ends at the lower border of the pons in a small triangular expansion, termed the foramen cecum.
Its lower part is interrupted by bundles of fibers that cross obliquely from one side to the other, and constitute the pyramidal decussation.
Some fibers, termed the anterior external arcuate fibers, emerge from the fissure above this decussation and curve lateralward and upward over the surface of the medulla oblongata to join the inferior peduncle.
The reticular formation of the medulla oblongata, shown by a transverse section passing through the middle of the olive.
|This neuroanatomy article is a stub. You can help Wikipedia by expanding it.|