tensor tympanimedical dictionary

<anatomy, muscle> Origin, the cartilaginous part of the auditory (eustachian) tube and the walls of its hemi-canal just above the bony portion of the auditory tube; insertion, handle of malleus; action, draws the handle of the malleus medialward tensing the tympanic membrane to protect it from excessive vibration by loud sounds. Nerve supply, branches of trigeminal through the otic ganglion.

Synonyms: musculus tensor tympani, tensor muscle of tympanic membrane, Toynbee's muscle.

(05 Mar 2000)