Dictionary > Petrotympanic fissure

Petrotympanic fissure

Definition
noun
A narrow transverse slit dividing the mandibular fossa of the temporal bone into tympanic and petrous portions.
Supplement
The contents of the fissure include communications of cranial nerves VII and IX to the infratemporal fossa.
Word origin:
Synonyms:

  • glaserian fissure
  • fissura petrotympanica


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