Stimulation of horizontal semicircular canal causes nystagmus in which directions ?
Veical
Horizontal
Rotary
Any of the three
Ans. is 'b' i.e., Horizontal The cupulae of the semicircular canals are stimulated by movement of endolymphatic fluid and each canal causes the nystagmus in its own plane :- Stimulation of horizontal SCC - 4 Horizontal nystagmus. Stimulation of superior SCC - 4 Rotary nystagmus. Stimulation of veical SCC - Veical nystagmus