<prompt> Following are the laboratory tests for the diagnosis of vestibular dysfunction except ?ElectronystagmographyOptokinetic testGalvanic testGelles test  <response>: Ans. is d i.e., Gelles test Vestibular system The vestibular system contributes to balance and to the sense of spatial orientation. It is a sensory system that provides the leading contribution about movement and sense of balance. It includes the labyrinth semicircular canals and otolith : utricle sacules of the inner ear and is situated in the vestibulum in the inner ear. The symptoms of vestibular dysfunction are veigo, dizziness and Unbalance. 