superior semicircular canal dehiscence

Superior semicircular canal dehiscence (SSCD) is a medical condition where the bone forming the exterior of the superior semicircular canal thins or is absent. This can lead to amplified body sounds, such as those from eye movements or a heartbeat, being perceived by the patient.1

The semicircular canals are three loop-shaped organs in the inner ear that are crucial for balance and stability. They sense the rotation and orientation of the head in three-dimensional space. These canals are filled with a fluid called endolymph, and movement of this fluid causes tiny hair cells within the canals to bend, generating electrical signals that are sent to the brain. These signals help the brain maintain balance and stabilize vision during head movements.12