Brain herniation syndromes: Difference between revisions
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[[File:Brain herniation.png|thumbnail|Type of brain herniation]] | [[File:Brain herniation.png|thumbnail|Type of brain herniation]] | ||
#Uncal | #Uncal | ||
#* | #*Blown pupil ([[third nerve palsy]], compression from uncus into tentorium cerebelli | ||
#* | #*Hemiparesis/babinski (75% contralateral) | ||
#Central Transtentorial | #Central Transtentorial | ||
#* | #*Pinpoint → nonresponsive midpoint pupils | ||
#* | #*Motor weakness → increased tone → flexor, then extensor posturing | ||
#Cerebellotonsilar | #Cerebellotonsilar (posterior fossa pressure) | ||
#* | #*Pinpoint pupils | ||
#* | #*Sudden respiratory and cardiovascular collapse | ||
#* | #*Flaccid quadriplegia | ||
#Upward Transtentorial | #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 | |||
==See Also== | ==See Also== | ||
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