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NYSTAGMUS, GAZE SHIFT, AND SELF‐MOTION PERCEPTION DURING SINUSOIDAL HEAD AND NECK ROTATION

Report on eye movements and perceived horizontal head rotation in 26 healthy students during sinusoidal vestibular, visual, cervical, congruent vestibular-plus-visual, or vestibular-plus-cervical stimulation. Circularvection occurred more often during neck afferent than during full-field optokinetic stimuli. In contrast, the cervico-ocular response had a low average velocity. As first noted by Frenzel (1928), a greater gaze shift distinguished the normal cervical from the normal labyrinthine response. The cervico-ocular and vestibulo-ocular responses were found to add up. Clinically, the results imply that ocular movements may be a poor measure of dizziness in cervical syndromes.