In otosclerosis tinnitus isdue to: [LQ
|B||increase vascularity In lesion|
|D||All of the above|
Symptoms of Otosclerosis
a. Hearing loss
b. Paracusis willisi
- It is the presenting symptom. Hearing loss is painless and has insidious onset. It is bilateral conductive type and
usually starts in twenties.
Patient hears better in noisy than quiet surroundings
- More in cochlear otosclerosis. it indicates sensorineural degeneration
- Monotonous, well modulated soft speech
Patient hears better in noise. Seen in otosclerosis.
SNHL associated with aging. Manifests at 65 years of age. (It is physiological)
Sensation of discomfort/pain on exposure to loud noises. Seen in injury to nerve to stapedius.
Patient hears same tone as of different pitches in either ear (distortion of sound). Seen in Meniere's disease
a. Paracusis: Scotts Brown
b. Paracusis refers to auditory dysfunction, in which the perception of volume, pitch, timbre or other quality of sound may be altereD.
c. In majority of cases, paracusis are attributed to abnormalities at the auditory periphery (as in otosclerosis) However, they have also been reported in CNS lesions including temporal lobe (This is because 'Timbre' of a sound is perceived by well defined regions of posterior Heschl's gyrus and superior temporal sulcus extending into the circular insular sulcus, of both left and right hemisphere)