Pyramid of medulla oblongata

Nerves · Latin: Pyramis medullae oblongatae

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PYRAMID OF MEDULLA OBLONGATA/ MEDULLARY PYRAMIDS (BRAINSTEM)

The medullary pyramids are paired white matter structures of the brainstem's medulla oblongata that contain motor fibers of the corticospinal and corticobulbar tracts – known together as the pyramidal tracts.

The lower limit of the pyramids is marked when the fibers cross (decussate).

Definition from Wikipedia, CC BY-SA 4.0.