Cold caloric test stimulates
Stimulation of semicircular canal produces nystagmus and the direction of nystagmus is determined by the plane of the canal being stimulated. In cold caloric test, the lateral semicircular canal is stimulated. (Ref: Diseases of EAR, NOSE AND THROAT by PL DHINGRA - 6th Edition)
Cochlea
Lateral semicircular canal
Posterior semicircular canal
All
Ear