The Peculiarities of Spatial Orientation of Person in Conditions of G-Influences
AEROSPACE MEDICINE AND MILITARY ERGONOMICS CENTER MOSCOW (RUSSIA) TECHNOLOGYAND PHYSIOLOGY DEPT
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Six test subjects were subjected to lateral Gy and longitudinal-lateral GzGy accelerations in a centrifuge with a rotation radius of 6.55 m. During rotation, test subjects were instructed to indicate the position of subjective visual vertical. Results of this study demonstrated that during exposure to Gy and GzGy accelerations, the direction of the indicated subjective vertical approached the direction of the resultant acceleration vector when the lateral component increased. This observed effect decreases with an increase of the longitudinal component of the acceleration. It was suggested that exposure to i.e. pulling high lateral acceleration up to 2-3 Gy in highly maneuverable aircraft can hinder spatial orientation of a pilot due to this persistent illusory spatial position as reported above. Our analysis showed that the process of spatial orientation under the conditions of G-load influence becomes more difficult and it is depending on the compromise between visual and vestibular-proprioceptive inputs. On account of this finding, it may be proposed that under conditions of G-load influence, pilots that rely primarily on visual perception may be exposed to higher risk of spatial disorientation.
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