The human subject was passively oscillated in the upright position through an angular displacement of 2[degree] at rates of one complete oscillation in 9 secs., 4.5 secs, and 3 secs, respectively on a rotation platform. The position of the head was systematically varied through 3 positions. Voluntary response to perceived motion of the body with the subject blindfolded was recorded on the smoked drum together with movements of the platform and time line. Significant differences were found between the 3 positions of the head. In effectiveness of response they were ranked as follows head inclined backward with eye-ear axis at 45[degree], eye-ear axis on the horizontal and head inclined forward eye-ear axis at 45[degree].