Visual and vestibular factors influencing vestibular navigation

摘要: In order to elucidate the role of “starting point” in path integration, normal subjects underwent a self-rotational task motor-driven turntable rotating around an earth-vertical axis. They were passively rotated (“stimulus”) and had return starting point, controlling direction velocity by means joystick (“response”). The test included conditions with earth-fixed target (EFT) as shown before stimulus, without EFT presentation. subject's response always took place total darkness. Subjects succeeded returning point all but more precise (i.e. smaller variability responses) than other conditions. larger data scatter (inaccuracy) these latter tasks was directly related peak velocity, whereas there no relationship between amplitude motion. These results suggest that presentation (the EFT) allows real time integration take place, thereby improving accuracy during self-controlled motion dark. Five also tested same rotational paradigm darkness throughout, head different position stimulus motions. Thus, detection performed semicircular canals response. used upright hyper-extended backward motion, It found did not differ from stimulus/response change or position. indicate estimates trajectory are, within limits, independent canal plane.