Boundaries Of Attic In Middle Ear

Pressure in the middle ear is maintained through the eustachian tubes which are closed when not in use.

Boundaries of attic in middle ear.

Tegmen tympani a thin bony plate that is a part of petrous part of temporal bone separates the middle ear cleft from middle cranial fossa. A slight constriction divides it into an upper and a lower chamber the tympanum tympanic cavity proper below and the epitympanum above. The portion of middle ear around the eustachian tube opening is termed as protympanum. In human anatomy prussak s space is the small middle ear recess bordered laterally by the flaccid part of shrapnell s membrane superiorly by the scutum a sharp bony spur that is formed by the superior wall of the external auditory canal and lateral malleal ligament inferiorly by the lateral process of the malleus and medially by the neck of the malleus.

The middle ear space read more. Roof floor and medial lateral anterior and posterior walls. Tympanums tympana is an air filled chamber in the petrous part of the temporal bone. It is separated from the external ear by the tympanic membrane and from the inner ear by the medial wall of the tympanic cavity.

The cavity of the middle ear is a narrow air filled space. Presence of more goblet cells near the orifice of e. Step 3 initial dissection commences by curetting the outer attic wall and following the cholesteatoma sac to its lateral extent akin to a front to back mastoidectomy atticoantrostomy. The eardrum acts as a natural boundary between the middle ear and the ear canal.

Infection in the middle ear may spread superiorly and lead to formation of abscess in the meninges especially extradural abscess meningitis or if severe it may even lead. These chambers are also referred to as the atrium and the attic respectively. It contains the three auditory ossicles whose purpose is to transmit sound vibrations from. The middle ear and attic are inspected to evaluate the pattern of disease and ossicular chain involvement.