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cochlear labyrinth

The labyrinth is a system of fluid passages in the inner ear, including both the cochlea, which is part of the auditory system, and the vestibular system, which provides the sense of balance. It is named by analogy with the mythical maze that imprisoned the Minotaur, because of its appearance. The bony labyrinth, or osseous labyrinth, is the network of passages with bony walls lined with periosteum. The bony labyrinth is lined with the membranous labyrinth. There is a layer of perilymph between them. The three parts of the bony labyrinth are the vestibule of the ear, the semicircular canals, and the cochlea. The vestibular system is the region of the inner ear where the semicircular canals converge, close to the cochlea (the hearing organ). The vestibular system works with the visual system to keep objects in focus when the head is moving. Joint and muscle receptors also are important in maintaining balance. The brain receives, interprets, and processes the information from these systems that control our balance. [WP,unvetted].

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유형 Muscle
상위 구조물 organ part
FMA ID 61259

Frequently Asked Questions

What is the cochlear labyrinth?

The cochlear labyrinth is part of the inner ear consisting of a system of fluid-filled passages within the bony cochlea. It includes the cochlea itself (for hearing) and is closely associated with the vestibular labyrinth (for balance), together forming the membranous labyrinth within the bony labyrinth.

What fluid systems are present in the cochlear labyrinth?

The cochlear labyrinth contains two distinct fluid compartments: the perilymph (in the scala vestibuli and scala tympani, similar in composition to cerebrospinal fluid) and the endolymph (in the scala media/cochlear duct, high in potassium), separated by the basilar membrane and Reissner's membrane.

What are the three scalae of the cochlear labyrinth?

The cochlea contains three fluid-filled chambers: the scala vestibuli (perilymph, connected to the oval window), the scala media or cochlear duct (endolymph, containing the organ of Corti), and the scala tympani (perilymph, connected to the round window).

How is the bony labyrinth related to the cochlear labyrinth?

The bony labyrinth is a series of bony cavities in the petrous part of the temporal bone lined with periosteum. The membranous labyrinth (including the cochlear duct) is suspended within it, with the space between them filled with perilymph.

What is the clinical relevance of the cochlear labyrinth?

Disorders of the cochlear labyrinth include sensorineural hearing loss (damage to hair cells in the organ of Corti), labyrinthitis (inflammation), Meniere's disease (endolymph hydrops causing hearing loss, tinnitus, and vertigo), and cochlear implants that directly stimulate the cochlear nerve.

References

  1. Foundational Model of Anatomy — FMA:61259 Reference anatomy ontology (University of Washington)
  2. UBERON — UBERON:0002499 Cross-species anatomy ontology (EMBL-EBI Ontology Lookup Service)

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Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.