tentorial notch(redirected from notch of tentorium)
the triangular opening in the tentorium cerebelli through which the brainstem extends from the posterior into the middle cranial fossa.
Etymology: L, tentorium, tent; OFr, enochier
an area occupied by the midbrain and enclosed by the free border of the tentorium cerebelli and the sphenoid bone.
An arched cavity in the free border of the tentorium cerebelli through which the brainstem passes.
See also: notch