What is the osseous labyrinth?
The bony labyrinth (also osseous labyrinth or otic capsule) is the rigid, bony outer wall of the inner ear in the temporal bone. It consists of three parts: the vestibule, semicircular canals, and cochlea. These are cavities hollowed out of the substance of the bone, and lined by periosteum.
What is the function of osseous labyrinth?
The internal ear 7.68) consists of a bony labyrinth inside which is enclosed the membranous labyrinth. The membranous labyrinth contains endolymph and the sensory end-organs for hearing and vestibular functions. The bony labyrinth contains perilymph, which surrounds the membranous labyrinth.
What is the meaning of membranous labyrinth?
Medical Definition of membranous labyrinth : the system of membrane-lined interconnected sacs and passages that is suspended within the bony labyrinth of the inner ear, is filled with endolymph and surrounded by perilymph, and includes the cochlear duct, utricle, saccule, and semicircular ducts.
What does the medical term labyrinth mean?
balance portion
Definition. The labyrinth is the medical terminology for the balance portion of the inner ear. The inner ear consists of a complex area in the temporal bone and can be divided into three parts: the vestibule (in the middle), cochlea (in front), and semicircular canals (in the back).
Where is the osseous labyrinth located?
temporal bone
The bony labyrinth is a series of bony cavities within the petrous part of the temporal bone. It consists of three parts – the cochlea, vestibule and the three semi-circular canals. The vestibule is the central part of the bony labyrinth.
What are the three subdivisions of the bony labyrinth?
Within the bony labyrinth is a membranous labyrinth, which is also divided into three parts: the semicircular ducts; two saclike structures, the saccule and utricle, located in the vestibule; and the cochlear duct, which is the only part of the inner ear involved in hearing.
What is the difference between the bony labyrinth and the membranous labyrinth?
The bony labyrinth consists of the cochlea, an oval cavity called the vestibule, and the semicircular canals. The membranous labyrinth is contained within the bony labyrinth and consists of the utricle, the saccule, and the lateral, superior and posterior semicircular ducts.
Which is found inside the membranous labyrinth?
The component parts of the membranous labyrinth are the three semicircular ducts, each with a sense organ for rotational movement; the cochlear duct, with the sense organ for sound vibrations, and in the vestibule, the utricle and saccule, with their two sense organs for linear movement.
What is the difference between the osseous and membranous labyrinths?
The osseous labyrinth is a bony canal in the temporal bone. The membranous labyrinth is a tube of similar shape that lies within the osseous labyrinth.
Where does the name osseous labyrinth come from?
Etymology: L, os, bone; Gk, labyrinthos, maze. the bony part of the internal ear, which transmits sound vibrations from the middle ear to the eighth cranial nerve. It is composed of three cavities: the vestibule, the semicircular canals, and the cochlea, all of which contain perilymph, in which a membranous labyrinth is suspended.
What is the medical definition of a bony labyrinth?
medical Definition of bony labyrinth. : the cavity in the petrous portion of the temporal bone that contains the membranous labyrinth of the inner ear and is divided into the vestibule, cochlea, and semicircular canals — called also osseous labyrinth.
Where is the membranous labyrinth of the inner ear?
Log In. : the cavity in the petrous portion of the temporal bone that contains the membranous labyrinth of the inner ear and is divided into the vestibule, cochlea, and semicircular canals. — called also osseous labyrinth.
Where does the osseous labyrinth transmit sound vibrations?
osseous labyrinth. the bony part of the internal ear, which transmits sound vibrations from the middle ear to the eighth cranial nerve.