tympanic plexus

Anatomy, Medicine, Neuroanatomy, Neurology, Neuroscience, Sciences A nerve plexus of the middle ear that is formed by the tympanic nerve and two or three filaments from the carotid plexus, sends fibers to the mucous membranes of the middle ear, the eustachian tube, and the mastoid cells, and gives off the lesser petrosal nerve to the otic ganglion.