Tegmen tympani

Definition

The Tegmental Wall or Roof (paries tegmentalis) is formed by a thin plate of bone, the tegmen tympani, which separates the cranial and tympanic cavities. It is situated on the anterior surface of the petrous portion of the temporal bone close to its angle of junction with the squama temporalis; it is prolonged backward so as to roof in the tympanic antrum, and forward to cover in the semicanal for the Tensor tympani muscle. Its lateral edge corresponds with the remains of the petrosquamous suture[Grays] .

Also known as paries tegmentalis cavi tympani, tegmental roof of tympanic cavity, tegmental wall of tympanic cavity — per UBERON

The Tegmen tympani is a part of the Sensory (Ear).