caa a22 4500 445352604 CHVBK 20180317142849.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00221-011-2900-z doi (NATIONALLICENCE)springer-10.1007/s00221-011-2900-z Human spatial orientation in non-stationary environments: relation between self-turning perception and detection of surround motion [Elektronische Daten] [Reinhart Jürgens, Wolfgang Becker] We investigated the relative weighting of vestibular, optokinetic and podokinetic (foot and leg proprioceptive) cues for the perception of self-turning in an environment which was either stationary (concordant stimulation) or moving (discordant stimulation) and asked whether cue weighting changes if subjects (Ss) detect a discordance. Ss (N=18) stood on a turntable inside an optokinetic drum and turned either passively (turntable rotating) or actively in space at constant velocities of 15, 30, or 60°/s. Sensory discordance was introduced by simultaneous rotations of the environment (drum and/or turntable) at ±{5, 10, 20, 40, 80}% of self-turning velocity. In one experiment, Ss were to detect these rotations (i.e. the sensory discordance), and in a second experiment they reported perceived angular self-displacement. Discordant optokinetic cues were better detected, and more heavily weighted for self-turning perception, than discordant podokinetic cues. Within Ss, weights did not depend on whether a discordance was detected or not. Across Ss, optokinetic weights varied over a large range and were negatively correlated with the detection scores: the more perception was influenced by discordant optokinetic cues, the poorer was the detection score; no such correlation was found among the podokinetic results. These results are interpreted in terms of a "self-referential” model that makes the following assumptions: (1) a weighted average of the available sensory cues both determines turning perception and serves as a reference to which the optokinetic cue is compared; (2) a discordance is detected if the difference between reference and optokinetic cue exceeds some threshold; (3) the threshold value corresponds to about the same multiple of sensory uncertainty in all Ss. With these assumptions the model explains the observed relation between optokinetic weight and detection score. Springer-Verlag, 2011 Self-turning perception nationallicence Motion detection nationallicence Visual surround motion nationallicence Foot support motion nationallicence Optokinetic-vestibular discordance nationallicence Podokinetic-vestibular discordance nationallicence Spatial orientation nationallicence Sensory conflict nationallicence Jürgens Reinhart Sektion Neurophysiologie, Universität Ulm, Albert Einstein Allee 47, 89081, Ulm, Germany aut Becker Wolfgang Sektion Neurophysiologie, Universität Ulm, Albert Einstein Allee 47, 89081, Ulm, Germany aut Experimental Brain Research Springer-Verlag 215/3-4(2011-12-01), 327-344 0014-4819 215:3-4<327 2011 215 221 https://doi.org/10.1007/s00221-011-2900-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-011-2900-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jürgens Reinhart Sektion Neurophysiologie, Universität Ulm, Albert Einstein Allee 47, 89081, Ulm, Germany aut NATIONALLICENCE 700 1- Becker Wolfgang Sektion Neurophysiologie, Universität Ulm, Albert Einstein Allee 47, 89081, Ulm, Germany aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 215/3-4(2011-12-01), 327-344 0014-4819 215:3-4<327 2011 215 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer