Brain herniation syndromes: Difference between revisions

Latest revision as of 23:44, 1 October 2019

Type of brain herniation

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

Authors:

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 ==Types==
+[[File:Brain herniation.png|thumbnail|Type of brain herniation]]
+#Uncal
+#*Blown pupil ([[third nerve palsy]], compression from uncus into tentorium cerebelli
+#*[[weakness|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 failure|respiratory]] and [[shock|cardiovascular collapse]]
+#*Flaccid [[weakness|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
+==See Also==
+*[[Elevated intracranial pressure]]
+*[[Head trauma (main)]]
+*[[Intracranial hemorrhage (main)]]
-. Uncal
+==References==
+<references/>
--blown pupil
+[[Category:Neurology]]
--hemiparesis/babinski (75% contralat)
-. Central Transtentorial
--B pinpoint --> nonresponsive midpoint
--B motor weakness/inc tone
-. Cerebellotonsilar
--B pinpoint
--sudden cario/resp colapse
--flacid quadraplegia
-. Upward Transtentorial
--B pinpoint
--downward conjugate gaze
-==Source==
-/15/06 DONALDSON (adapted from Rosen)
-[[Category:Neuro]]