What is tectorial membrane in anatomy?
Anatomical terminology The tectoria membrane (TM) is one of two acellular membranes in the cochlea of the inner ear, the other being the basilar membrane (BM). “Tectorial” in anatomy means forming a cover.
What is the role of tectorial membrane?
The tectorial membrane (TM) is an extracellular connective tissue that covers the mechanically-sensitive hair bundles of the sensory receptor cells in the inner ear. It occupies a strategic position, playing a key role in transforming sound to mechanical stimulation.
What does tectorial membrane push down on?
The organ of Corti sits on top of the basilar membrane and is covered by a gelatinous matrix called the tectorial membrane. Sound vibrations traveling down the cochlear fluid cause the basilar membrane to vibrate, which then stimulates the hair cells by displacing their hair bundles relative to the tectorial membrane.
What is the difference between the basilar membrane and the tectorial membrane?
The key difference between basilar and tectorial membrane is that basilar membrane is the membrane that forms the floor of the cochlear duct, on which the cochlear hair cells lie embedded, while tectorial membrane is the fibrous sheet overlying the apical surface of the cochlear hair cells.
What is the function of Scala Vestibuli?
The vestibular duct or scala vestibuli is a perilymph-filled cavity inside the cochlea of the inner ear that conducts sound vibrations to the cochlear duct.
Is tectorial membrane gelatinous?
inner ear anatomy …a gelatinous membrane called the tectorial membrane. This membrane is an acellular gelatinous structure that covers the top of the spiral limbus as a thin fibrillar layer, then becomes thicker as it extends outward over the inner sulcus and the reticular lamina.
What is the meaning of Tectorial?
Definition of tectorial : forming a covering : resembling a roof.
What is the apex of the basilar membrane?
The basilar membrane is widest (0.42–0.65 mm) and least stiff at the apex of the cochlea, and narrowest (0.08–0.16 mm) and stiffest at the base (near the round and oval windows). High-frequency sounds localize near the base of the cochlea, while low-frequency sounds localize near the apex.
What is Labrynthitis?
Labyrinthitis is an inner ear infection that affects your balance. It’s sometimes called vestibular neuritis.