<prompt> Stimulation of posterior semicircular canal producesHorizontal nystagmusVeical nystagmusRotatory nystagmusAll of the above  <response>: Stimulation of semicircular canal produces nystagmus and the direction of nystagmus is determined by the plane of the canal being stimulated. Thus nystagmus is veical from the posterior canal. Ref: Diseases of EAR, NOSE AND THROAT by PL DHINGRA - 6th Edition 