Passive motion reduces vestibular balance and perceptual responses.

摘要: Key points Human activity exposes the vestibular organs to a wide dynamic range of motion. We aimed discover whether CNS regulates sensitivity afference during exposure ambient motion. Balance and perceptual responses stimulation were measured before after 10 min period imposed, moderate intensity, stochastic whole-body rotation. After this conditioning, balance reflexes evoked by galvanic halved in amplitude. Conditioning doubled thresholds for perceiving small rotations, reduced perceptions amplitude real illusory rotation stimulation. We conclude that auto-regulates sensory probably involves central peripheral mechanisms, as might arise from efferent regulation. Failure these regulatory mechanisms at different levels could lead disorders movement perception control standing. Abstract With hypothesis is regulated deal with environmental motion conditions, we explored effects passive on responses. In 10 subjects, imposed motion. Vestibulospinal standing (GVS) shear reaction forces. Perceptual tests detecting angular motion, suprathreshold GVS-evoked rotation. The conditioning was yaw (0.5–2.5 Hz ≤ 300 deg s−2) subjects seated. This markedly reflexive medium latency reflex (300–350 ms) (48%; P = 0.011) but short response unaffected. Thresholds more than (248%; P < 0.001) remained elevated 30 min. Over-estimation (30–180 deg every 5 s) significantly (41.1 21.5%; P = 0.033). Conditioning sensations GVS (mean 113 deg 10 s 1 mA) 44% (P < 0.01) effect persisted least 1 h (24% reduction; P < 0.05). We system autoregulation exists possibly through regulation. propose failure standing.