Gain perception during static tilt in roll induced by centrifugation (A) or static tilt in pitch induced by actual tilt relative to gravity (B) before (L-120, L-90, L-60 days) and after (R+0 to R+8 days) spaceflight.
In A, gain was calculated as the ratio of subjective reported tilt versus tilt of the gravitoinertial acceleration (GIA) vector. In B, gain was calculated as the ratio of subjective reported tilt versus actual chair tilt. Dashed lines correspond to a gain of unity. Mean ± SE of 10 subjects. *p<0.05 relative to the last pre-flight session.