CT demonstrates the uncovered (naked) balance canal on the left side

 Vestibular Evoked Mygoenic Potential Testing (VEMP) is an innovative new testing technique is now being utilized at our H&B Center.  The VEMP response is helpful in the diagnosis of Superior Canal Dehiscence Syndrome (SCDS) and other inner ear conditions.  SCDS is a syndrome of sound and/or pressure induced vertigo due to absence of bone covering part of the inner ear balance canals (dehiscence)..
VEMP testing is based on the reflex which occurs between the otolith system (specifically the saccule) and the sternocleidomastoid (SCM) muscle.  VEMPs provide diagnostic information about saccular and/or inferior vestibular nerve function.  VEMP responses are unaffected by sensorineural hearing loss and can even be performed on patients with profound cochlear losses. 

VEMPs are recorded with the patient in a reclined position.  When the stimulus (loud clicks) is presented, the patient is to lift their head and turn their head all the way to the opposite side of the stimulus and down toward their chest to activate the neck muscle.  If the VEMP response is abnormal, it can be helpful in determining the possibility/likelihood of a superior semicircular canal dehiscence which can be effectively treated.