petrotympanic fissure (glaserian fissure)

Introduction

A fissure between the tympanic & petrous portions of the temporal bone.

Function

Transmits the chorda tympani nerve through a small patent portion, the anterior canaliculus of the chorda tympani.

More general terms

• sulcus

Additional terms

• petrotympanic fissure (glaserian fissure)
• tympanosquamous fissure

Component of

• temporal bone