herniation

herniation (her-ne-a´shun)

Formation of a protrusion.
caudal transtentorial h. displacement of medial temporal structures through the incisura, with or without rostrocaudal brainstem shift.uncal h;
cingulate h. displacement of the cingulate gyrus beneath the falx.
foraminal h. displacement of cerebellar tonsils through the foramen magnum.
rostral transtentorial h. displacement of anterior cerebellar structures through the incisura, with or without caudorostral brainstem shift.
sphenoidal h. displacement of ventral frontal lobar tissue over the sphenoid ridge.
subfalcial h. h. beneath the falx cerebri; usually of the cingulate gyrus.
tonsillar h. h. of the cerebellar tonsils through the foramen magnum.
transtentorial h. h. into the incisura, either from above (rostral h.) or below (caudal h.).
uncal h. caudal transtentorial h

 

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