petrotympaniska
The petrotympanic fissure, also known as the petrotympanic lamina or Glaserian fissure, is a fissure in the temporal bone of the skull. It is located at the junction of the petrous and tympanic parts of the temporal bone, situated between the squamous and mastoid parts. This fissure serves as a passage for several important structures, contributing to the complex anatomy of the middle ear and its connections.
Within the petrotympanic fissure, the anterior process of the malleus and the chorda tympani nerve pass through.