{"id":402,"date":"2021-01-04T16:51:58","date_gmt":"2021-01-04T23:51:58","guid":{"rendered":"https:\/\/neurotucson.fm1.dev\/ear-hearing\/ear-specific-dizziness\/superior-semicircular-canal-dehiscence-syndrome\/"},"modified":"2021-09-09T18:15:18","modified_gmt":"2021-09-10T00:15:18","slug":"superior-semicircular-canal-dehiscence-syndrome","status":"publish","type":"page","link":"https:\/\/neurotucson.com\/ear-hearing\/ear-specific-dizziness\/superior-semicircular-canal-dehiscence-syndrome\/","title":{"rendered":"Superior Semicircular Canal Dehiscence Syndrome"},"content":{"rendered":"\n

The inner ear contains three semicircular canals, which are responsible for sensing angular acceleration of the head and sending that balance information on to the brain. When the temporal bone is thinner than normal at the dome of the superior semicircular canal, an opening or dehiscence results \u2013 causing Superior Semicircular Canal Dehiscence Syndrome (SSCD). Symptoms of SSCD include: Tullio phenomenon (experiencing vertigo after being exposed to a loud sound), low frequency conductive hearing loss<\/a> in the presence of a supra-normal bone line by audiogram, heightened sensitivity to body sounds (pulsatile tinnitus<\/a>, hearing oneself chew, hearing one\u2019s eyes move), autophony (where your own voice appears very loud in the affected ear), heightened sensitivity to sources of vibration in the environment, dizziness associated with the Valsalva maneuver (bearing down) and a sense of fullness in the affected ear.<\/p>\n\n\n\n

SSCD is diagnosed using a temporal bone CT scan as well as comprehensive audiometric and vestibular testing, including vestibular evoked myogenic potentials (VEMPs). If symptoms persist and become unbearable, surgery to repair the dehiscent semicircular canal (transmastoid or middle cranial fossa approaches) is an option.<\/p>\n\n\n\n

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