The membranous labyrinth is a continuous system of endolymph-filled ducts. It is located in the bony labyrinth, surrounded by perilymph. It consists of the cochlear canal, three semicircular canals, the saccule and the utricle. Two parts of the membranous labyrinth; The saccule and utricle are located inside the vestibule. It is believed that the symptoms are caused by excessive accumulation of endolymph in the membranous labyrinth, resulting in progressive stretching of the ducts. The resulting pressure fluctuations damage the thin membranes of the ear, which detect balance and sound. The auditory vesicle produces the utricular and sac-like components of the membranous labyrinth. They contain the sensory hair cells and otoliths of the macula of the utricle or saccule that respond to linear acceleration and gravity. The basilar membrane separates the cochlear duct from the tympanic scala, a cavity in the cochlear labyrinth.

The lateral wall of the cochlear canal is formed by the spiral ligament and the vascular striade, which produces endolymph. Hair cells develop from the lateral and medial ridges of the cochlear canal, which, together with the tectorial membrane, form the spiral organ of the corti. [3, 5, 6, 7, 8] The cochlea is a spiral bony chamber that contains the cochlear duct of the membranous labyrinth. The sense of hearing is provided by receptors in the cochlear canal. A pair of perilymph-filled chambers are located on either side of the canal. The whole apparatus revolves around a central bone hub, similar to a snail shell. [4] “Bone Labyrinth”. Medical Dictionary, Merriam-Webster, Retrieved 4 October 2022. The inner ear is located in the petrosis part of the temporal bone.

It lies between the middle ear and the inner acoustic meatus, which lie laterally or medially. The inner ear consists of two main components – the bone labyrinth and the membranous labyrinth. The bony labyrinth and the membranous labyrinth have different arterial reserves. The bony labyrinth receives its blood supply from three arteries, which also supply the surrounding temporal bone: The perilymph circulates in the space between the bony and membranous labyrinth. When properly worked, the vestibular system also transmits information about head movement to the eye muscle and trains the vestibulo-ocular reflex to maintain continuous visual concentration during movement. When the vestibular system is affected by labyrinthitis, rapid and unwanted eye movement (nystagmus) often results from incorrect indication of rotational movement. Nausea, anxiety, and a general feeling of bad feeling are common due to the distorted balance signals the brain receives from the inner ear. It can also be caused by pressure changes such as those that occur in flight or diving. The bony labyrinth can be divided into vestibule, 3 semicircular canals and the cochlea. The vestibule contains a pair of membranous sacs: the saccule (sacculus) and the utricle (utriculus).

The receptors in the vestibule provide sensations of gravity and linear acceleration. The superficial contours of the inner ear are determined by a dense layer of bone known as the bony labyrinth, which refers to the network of canals. The walls of the bony labyrinth are continuous with the surrounding temporal bone. The inner contours of the bone labyrinth closely follow the contours of the membranous labyrinth, a delicate, interconnected network of fluid-filled tubes where the receptors are located. The membranous labyrinth is fed by the labyrinthine artery, a branch of the inferior cerebellar artery (or sometimes the basilar artery). It is divided into three branches: The bone labyrinth is studied in paleoanthropology because it is a good indicator of distinction between Neanderthals and modern humans. [4] [5] [6] [7] Labyrinthitis is an inflammation of the inner ear and a form of unilateral vestibular dysfunction. It takes its name from the labyrinths that house the vestibular system (the meaning of which changes in the position of the head). Labyrinthitis can cause balance problems. In addition to problems with balance control, a patient with labyrinthitis may experience hearing loss and tinnitus. Labyrinthitis is usually caused by a virus, but it can also result from bacterial infections, head injuries, extreme stress or allergy, or in response to a particular medication.

Bacterial and viral labyrinthitis can lead to permanent hearing loss, although this is rare. Labyrinthitis often follows an upper respiratory tract infection (URI). [4] The bony labyrinth (also bony 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, the semicircular canals and the cochlea. These are cavities dug into the substance of the bone and lined by the periosteum. They contain a clear liquid, perilymph, in which the membranous labyrinth is located. The walls of the bony labyrinth are made of dense bone everywhere except in 2 small areas near the base of the cochlear spiral. The round window consists of a thin, membranous partition that separates the perilymph from the cochlear chambers from the air-filled middle ear. Collagen fibers connect the bony edges of the opening, known as the oval window, to the base of the stirrup. [4] The cochlea houses the cochlear canal of the membranous labyrinth – the auditory part of the inner ear. It rotates around a central part of the bone called modiolus, creating a cone shape that points in an anterolateral direction.

The branches of the cochlear part of the vestibulocochlear nerve (VIII) are located at the base of the modiolus. A fluid called perilymph, whose properties are very similar to those of cerebrospinal fluid, circulates between the bony and membranous labyrinths. Another fluid, called endolymph, is contained in the membranous labyrinth. Endolymph has electrolyte concentrations that differ from those of typical body fluids. Interference or infection of the labyrinth can lead to a syndrome of diseases called labyrinthitis. Symptoms of labyrinthitis are temporary nausea, disorientation, dizziness and dizziness. Labyrinthitis can be caused by viral infections, bacterial infections, or a physical blockage of the inner ear. The vestibule is the central part of the bony labyrinth. It is separated from the middle ear by the oval window and communicates anteriorly with the cochlea and posteriorly with the semicircular canals. Ear, inside: A very complex structure whose essential component for hearing is the membranous labyrinth in which the fibers of the auditory nerve connect the ear to the brain. The membranous labyrinth is a system of fluid-filled sacs and communicating passages (tubes) (endolymph), and it is housed in a cavity called a bone labyrinth. In some places, the membranous labyrinth is connected to the bone labyrinth, and in other places, the membranous labyrinth inside the bony labyrinth is suspended in a fluid called perilymph.

The bony labyrinth consists of three parts: a central cavity called vestibule; semicircular canals that open into the vestibule; and a spiral tube called a cochlea.