Decorticate posture

[NontradCA]

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Can someone tell me why, when someone gets knocked out they go into decorticate posture briefly? Is it because they're getting a lateral blow to the head, mimicking an uncal herniation, supratentorially?

Here's a sample, but I've seen this in a lot of sports and fights etc.

 

[StraightOuttaBrooklyn]

If patient was initially decorticate but then became decerebrate, that would be suggestive of a transtent.

 

[eefen]

This may be part of it: https://en.wikipedia.org/wiki/Fencing_response

 

[AlmostAnMD]

ouch