Lip of the Tympanic Edge

The lip of the tympanic edge (labium limbi tympanicum, pna; labium tympanicum, bna, jna) is a fold of the mucous membrane located along the edge of the eardrum. It separates the external auditory canal from the middle ear.

The lip of the tympanic edge consists of two sections - anterior and posterior. The anterior section is attached to the handle of the malleus and can be retracted into the tympanic cavity when the malleus moves. The posterior part of the lip is attached to the bony edge of the eardrum.

The lip of the tympanic edge performs a protective function, preventing infection from entering the external auditory canal into the middle ear cavity. In addition, it participates in the ventilation and drainage system of the middle ear through the auditory tube. Damage to the lip can impair these functions and lead to the development of inflammatory diseases of the middle ear.

The lip tympanum is the part of the lip that lies along the edge of the eardrum. This lip consists of several layers of tissue that provide strength and flexibility to this area of ​​the lip.

The lip of the tympanum plays an important role in protecting the eardrum