Chennai, June 18 -- What is Superior Canal Dehiscence?
Superior canal dehiscence (SCD) occurs when there is an opening (dehiscence) in the bone above the superior semicircular canal of the inner ear due to progressive deterioration or due to a head trauma resulting in sensations of vertigo, tinnitus (persistent ringing sounds), and unusual sensitivity to sounds. To understand how these sensations develop, it is important to have knowledge of the anatomy and physiology of the ear.
Anatomy (and) Physiology of the Ear
The ear consists of 3 parts: external ear, middle ear, and inner ear. The external ear conducts the sound and leads it to the middle ear. The middle ear is connected to the nose and to the inner ear. Pressure is equalized in t...