Related Experiment Video
Updated: Aug 15, 2026

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
Published on: January 25, 2016
[Bilateral progressive sensorineural hearing loss of unknown aetiology]
1Specjalistyczne Centrum Diagnostyczno-Zabiegowe Medicina w Krakowie. olafzag@poczta.onet.pl
Unlabelled:
Bilateral progressive sensorineural hearing loss of unknown aetiology is diagnosed very rarely. Prognosis of hearing recovery is poor and results of treatment unsatisfactory. The disease occurs in teenagers and in elderly patients.
Case Report:
Total hearing loss developed in 81-years old female patient over the period of 2 months, despite intensive pharmacological treatment. No reason for the condition was established and diagnosis of bilateral progressive sensorineural hearing loss of unknown aetiology was established.
Result:
Click evoked otoacoustic emissions and distortion products of otoacoustic emissions disclosed cochlear pathology. Click evoked auditory brainstem responses were absent.
Conclusion:
Audiological results obtained in the discussed patient and also relatively isolated onset of deafness as well as the severity and persistence of the hearing loss suggest that bilateral progressive sensorineural hearing loss of unknown aetiology is most probably related to prominent hypoperfusion of the internal auditory artery.
Related Concept Videos
Auditory Pathway
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
The Cochlea
Unrenewable Cells
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of their outer...

