Pyramid (brainstem)

Pyramid (brainstem)
Brain: Pyramid (brainstem)
Gray679.png
Medulla oblongata and pons. Anterior surface. (Pyramid visible at center.)
Gray694.png
Section of the medulla oblongata at about the middle of the olive. (Pyramid visible at bottom center.)
Latin pyramis medullae oblongatae
Gray's subject #187 768
NeuroNames hier-702

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.

See also

Additional images

  • The formatio reticularis of the medulla oblongata, shown by a transverse section passing through the middle of the olive.

  • Dissection showing the projection fibers of the cerebellum.

  • Human brainstem anterior view

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.

v · d · eHuman brain: rhombencephalon, myelencephalon: medulla (TA A14.1.04, GA 9.767)
Dorsal
Surface
Grey: other
White: Sensory/ascending
White: Motor/descending
Ventral
White: Motor/descending
Surface
Anterior median fissure · Anterolateral sulcus · Olive · Pyramid
Grey: Raphe/
reticular

M: CNS

anat(n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco(m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug(N1A/2AB/C/3/4/7A/B/C/D)

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