Brain herniation syndromes: Difference between revisions
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#*Pinpoint pupils | #*Pinpoint pupils | ||
#*Downward conjugate gaze | #*Downward conjugate gaze | ||
#Subfalcine herniation (cerebral mass lesion causes medial surface of affected hemisphere to push against rigid falx cerebri, then herniate underneath) | #Subfalcine herniation (cerebral mass lesion causes medial surface of affected hemisphere to push against rigid falx cerebri, then herniate underneath) | ||
#*Cingulate gyrus most commonly affected | #*Cingulate gyrus most commonly affected | ||
#*Often clinically silent | #*Often clinically silent | ||
Revision as of 19:56, 13 October 2018
Types
- Uncal
- Blown pupil (third nerve palsy, compression from uncus into tentorium cerebelli
- Hemiparesis/babinski (75% contralateral)
- Central Transtentorial
- Pinpoint → nonresponsive midpoint pupils
- Motor weakness → increased tone → flexor, then extensor posturing
- Cerebellotonsilar (posterior fossa pressure)
- Pinpoint pupils
- Sudden respiratory and cardiovascular collapse
- Flaccid quadriplegia
- Upward Transtentorial
- Pinpoint pupils
- Downward conjugate gaze
- Subfalcine herniation (cerebral mass lesion causes medial surface of affected hemisphere to push against rigid falx cerebri, then herniate underneath)
- Cingulate gyrus most commonly affected
- Often clinically silent