Brain herniation syndromes: Difference between revisions
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#Uncal | #Uncal | ||
#*Blown pupil ([[third nerve palsy]], compression from uncus into tentorium cerebelli | #*Blown pupil ([[third nerve palsy]], compression from uncus into tentorium cerebelli | ||
#*Hemiparesis/babinski (75% contralateral) | #*[[weakness|Hemiparesis]]/babinski (75% contralateral) | ||
#Central Transtentorial | #Central Transtentorial | ||
#*Pinpoint → nonresponsive midpoint pupils | #*Pinpoint → nonresponsive midpoint pupils | ||
#*Motor weakness → increased tone → flexor, then extensor posturing | #*Motor [[weakness]] → increased tone → flexor, then extensor posturing | ||
#Cerebellotonsilar (posterior fossa pressure) | #Cerebellotonsilar (posterior fossa pressure) | ||
#*Pinpoint pupils | #*Pinpoint pupils | ||
#*Sudden respiratory and cardiovascular collapse | #*Sudden [[respiratory failure|respiratory]] and [[shock|cardiovascular collapse]] | ||
#*Flaccid quadriplegia | #*Flaccid [[weakness|quadriplegia]] | ||
#Upward Transtentorial | #Upward Transtentorial | ||
#*Pinpoint pupils | #*Pinpoint pupils | ||
Latest revision as of 23:44, 1 October 2019
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