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Updated: Jun 11, 2025

Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
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Narrow Internal Auditory Canal With Duplication in a Patient With Sensorineural Hearing Loss and Facial Palsy: A Case

Anusha Shree Thaneeru1, Rahul Suresh2, Jeevika Ujjappa1

  • 1Radiodiagnosis, Jagadguru Jayadeva Murugarajendra Medical College, Davangere, IND.

Cureus
|October 10, 2024
PubMed

Keywords:
duplicated iacfacial nerveinternal auditory canalsensorineural (sn) hearing lossvestibulocochlear nerve

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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