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Dictionary » P » Petrotympanic fissure

Petrotympanic fissure

petrotympanic fissure

A fissure between the tympanic and petrous portions of the temporal bone; it transmits the chorda tympani nerve through a small patent portion, the anterior canaliculus of the chorda tympani.

Synonym: fissura petrotympanica, glaserian fissure.


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