Nerve of the Sac

The nerve of the sac (lat. Nervus sacculi) is a nerve plexus in the pyramids of the temporal bone that nourishes and innervates the external auditory canal, the eardrum and the auditory ossicles of the middle ear, thus regulating their mobility and ensuring adequate transmission of sound waves to the cortical end of the auditory analyzer of the brain. Also, a nerve extending from the pyramid, called the vestibular nerve, is involved in the regulation of equilibrium (equilibrium). Strictly speaking, although it is often considered an independent branch of the pyramidal tract, it should rather be considered part of the complex dorsal vestibulospinal tract, a communication between the brain and specialized cells within the vestibular organ.