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1947 A. Graybiel et al. in Jrnl. Exper. Psychol. 37 170 The oculo-gravic illusion refers to the apparent displacement of an object in space which may be observed when the sensory receptors in the otolith organs are stimulated by an accelerative force which forms a resultant vector with the force of gravity.

1968 R. A. Weale From Sight to Light vi. 116 The oculogravic phenomenon was accompanied by a downward turn of the eyes as acceleration increased and if no fixation light was provided.

1974 V. B. Mountcastle et al. Med. Physiol. (ed. 13) I. xxvii. 716/2 When the resultant gravitoinertial force is displaced from the earth vertical, the subject perceives himself as tilted (the oculogravic illusion).

1987 D. J. Weatherall et al. Oxf. Textbk. Med. (ed. 2) I. vi. 116/1 Oculogravic illusions are regarded as being part of a situation where linear acceleration stimulates the otoliths and other receptors, resulting in displacement of the visual scene.