Control group N = 10
clear head-directed (i.e. anticompensatory) slow deviations of the eyes in all cases
cervico-ocular responses were typically variable and fluctuating in amplitude.
during the sustained trunk rotation the eyes drifted slowly to the center position
these movements correspond to the slow phases of vestibular nystagmus, no quick phases were triggered
the same rotation was delivered with head free and vestibulo-ocular response with clearly differentiated nystagmus beats was recorded in all subjects