Which of the following condition does show 'the third window effect' clinically?
The auditory and vestibular symptoms of dehiscent superior semicircular canal are due to exposure to external pressure along the dehiscent superior canal that is transmitted to the inner ear. The dehiscent poion of the superior canal acts as a third mobile window allowing acoustic energy to be dissipated there.
Perforated tympanum
Dehiscent superior semicircular canal
Round window anomaly
Oval window anomaly