Plica membranae tympani, often referred to as the plica, is a specifically formed fold or crease located on the tympanic membrane, also known as the eardrum. This structure can be found within the middle ear, separating the external ear from the middle ear cavity.
The plica membranae tympani is a delicate and thin section of tissue originating from the handle of the malleus, one of the three tiny bones present in the middle ear. It extends across the tympanic membrane towards the tympanic annulus, where it is anchored.
This fold serves several important functions within the auditory system. Firstly, it assists in the transmission of sound vibrations that enter the ear canal. As sound waves reach the eardrum, the plica membranae tympani vibrates and transfers these vibrations to the ossicles, which subsequently amplify and transmit the sound to the inner ear.
Furthermore, the plica membranae tympani aids in the protection of the middle ear by preventing potentially harmful substances, such as debris or foreign objects, from entering the delicate structures of the ear.
In certain clinical cases, the plica membranae tympani may undergo various abnormalities or pathologies, including inflammation, adhesion, or perforation. These conditions can affect hearing function and may require medical intervention or surgical treatment to restore the integrity and proper functioning of the eardrum and surrounding structures.
