Which membrane supports the spiral organ or organ of Corti?
The organ of Corti is overlain by the gel-like tectorial membrane, which is indirectly connected to the osseous spiral lamina through the spiral limbus. Only the stereocilia of the OHCs appear to be in contact with the tectorial membrane.
Is the membrane of the spiral organ?
The spiral organ (of Corti) resides on the basilar membrane and projects into the cochlear duct. The tectorial membrane is a gelatinous flap draped over the spiral organ which stimulates the hair cells when gliding across them in response to movement of the basilar membrane from pressure waves in the perilymph.
What membrane does the spiral organ rest on?
basilar membrane
The spiral organ consists of hair cells that rest on the basilar membrane. The tectorial membrane is located in close proximity to the hair cells.
What is the spiral organ of Corti?
The organ of Corti, also known as the spiral organ, is the receptor organ for hearing, located in the cochlea (housed inside the scala media). It is a strip of sensory epithelium made of hair cells which act as the sensory receptors of the inner ear.
What does the vestibular membrane do?
Function. The vestibular membrane helps to transmit vibrations from fluid in the vestibular duct to the cochlear duct. Together with the basilar membrane, the vestibular membrane creates a compartment in the cochlea filled with endolymph.
Is the organ of Corti attached to the vestibular membrane?
The organ of Corti rests on the basilar membrane and contains two types of hair cells: inner hair cells and outer hair cells. Inner hair cells transduce sound from vibrations to neural signals via the shearing action of their stereocilia.
What is the vestibular membrane?
The vestibular membrane, vestibular wall or Reissner’s membrane, is a membrane inside the cochlea of the inner ear. It separates the cochlear duct from the vestibular duct. It helps to transmit vibrations from fluid in the vestibular duct to the cochlear duct. It is named after the German anatomist Ernst Reissner.
What is in the vestibular apparatus?
vestibular system, apparatus of the inner ear involved in balance. The vestibular system consists of two structures of the bony labyrinth of the inner ear, the vestibule and the semicircular canals, and the structures of the membranous labyrinth contained within them.
What is the spiral limbus?
The spiral limbus is situated on the osseous spiral lamina which extends from the modiolus. The spiral limbus mainly consists of fibrocytes which are vulnerable to several stresses such as middle ear infections and acoustic trauma.
What is the spiral ligament?
The spiral ligament is a fibrous cushion located between the stria vascularis and the bony otic capsule. From: Haschek and Rousseaux’s Handbook of Toxicologic Pathology (Third Edition), 2013.
What is a spiral organ?
Where is the spiral organ of Corti located?
cochlea
The Organ of Corti is an organ of the inner ear located within the cochlea which contributes to audition. The Organ of Corti includes three rows of outer hair cells and one row of inner hair cells.
How is the spiral organ attached to the spiral lamina?
This organ is attached to the osseous spiral lamina by a dense connective tissue which forms the limbus of the osseous spiral lamina. The spiral organ is formed by supporting cells (phalangeal and pillar cells) and sensory cells with cilia.
What are the membranous contents of the vestibule?
The membranous contents of the vestibule are the saccule and utricle. The saccule is a small, fibrous pouch that communicates inferiorly with the cochlear duct via the ductus reuniens. The utricle is also a fibrous sac and communicates with the semi-circular ducts.
What does the vestibule do in the ear?
The vestibule lies medial to the tympanic cavity. It houses the sensory epithelia, or maculae, of the saccule and utricle, two components of the membranous labyrinth important for maintenance of balance. The vestibule also contains the oval window, through which vibrations are transmitted from the middle ear.
Inside the cochlear duct, leaning on the basilar lamina of the tympanic wall is located the organ of hearing, the spiral organ (organ of Corti) ( Fig. 15-15 ). This organ is attached to the osseous spiral lamina by a dense connective tissue which forms the limbus of the osseous spiral lamina.