Pyramid of medulla oblongata

Pyramid of medulla oblongata

Infobox Brain
Latin = pyramis medullae oblongatae
GraySubject = 187
GrayPage = 768

Caption = Medulla oblongata and pons. Anterior surface. (Pyramid visible at center.)

Caption2 = Section of the medulla oblongata at about the middle of the olive. (Pyramid visible at bottom center.)
IsPartOf =
Components =
Artery =
Vein =
BrainInfoType = hier
BrainInfoNumber = 702
MeshName =
MeshNumber =
DorlandsPre = p_44
DorlandsSuf = 12683083
The anterior or ventral portion of the medulla oblongata is named the pyramid and lies between the anterior median fissure and the antero-lateral sulcus.

Its upper end is slightly constricted, and between it and the pons the fibers of the abducent nerve emerge; a little below the pons it becomes enlarged and prominent, and finally tapers into the anterior funiculus of the medulla spinalis, with which, at first sight, it appears to be directly continuous.

ee also

* Corticospinal tract (also known as "pyramidal tract")
* Decussation of the pyramids


External links

* [ Diagram at]

Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • pyramid of medulla oblongata — pyramis medullae oblongatae …   Medical dictionary

  • Medulla oblongata — Brain: Medulla oblongata labeled at bottom left …   Wikipedia

  • Pyramid (disambiguation) — A pyramid is any three dimensional structure where the upper surfaces are triangular and converge at one point. Pyramid may also refer to:* Pyramid (geometry), a conic solid with polygonal base * Egyptian pyramids, the pyramids of Egypt **… …   Wikipedia

  • pyramid — 1. A term applied to a number of anatomic structures having a more or less pyramidal shape. SYN: pyramis [TA]. 2. A term denoting the petrous portion of the temporal bone. [G. pyramis (p. ), a p.] anterior p. SYN …   Medical dictionary

  • Pyramid (brainstem) — Brain: Pyramid (brainstem) Medulla oblongata and pons. Anterior surface. (Pyramid visible at center.) …   Wikipedia

  • Medulla — The innermost part. The spinal medulla, for example, is that part of the spinal cord that is lodged within the vertebral canal. * * * Any soft marrow like structure, especially in the center of a part. SEE ALSO: m. oblongata. SYN: substantia… …   Medical dictionary

  • pyramid — I. noun Etymology: Latin pyramid , pyramis, from Greek Date: 1549 1. a. an ancient massive structure found especially in Egypt having typically a square ground plan, outside walls in the form of four triangles that meet in a point at the top, and …   New Collegiate Dictionary

  • pyramid — n. 1) one of the conical masses that make up the medulla of the kidney, extending inwards from a base inside the cortex towards the pelvis of the kidney. 2) one of the elongated bulging areas on the anterior surface of the medulla oblongata in… …   The new mediacal dictionary

  • Corticospinal tract — Pyramidal tract redirects here. This page refers to the nerve fibres underlying the pyramids. For the actual area of the brain, Pyramids, see Pyramid of medulla oblongata. Brain: Corticospinal tract Deep dissection of brain stem. Lateral view. (… …   Wikipedia

  • pyramis medullae oblongatae — [TA] pyramid of medulla oblongata: either of two rounded masses, one on either side of the anterior median fissure of the medulla oblongata, composed of motor fibers from the cerebral cortex to the spinal cord and medulla oblongata. Called also p …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”