scholarly journals Head movement during horizontal and median sound localization experiments in which head-rotation is allowed

2013 ◽  
Author(s):  
Daisuke Morikawa ◽  
Yuki Toyoda ◽  
Tatsuya Hirahara
Keyword(s):  
Sound Localization ◽  
Head Movement ◽  
Head Rotation

scholarly journals Effects of head movement on front-back error in sound localization

2003 ◽  
Vol 24 (5) ◽  
pp. 322-324 ◽  
Author(s):  
Yukio Iwaya ◽  
Yôiti Suzuki ◽  
Daisuke Kimura
Keyword(s):  
Sound Localization ◽  
Head Movement

Evaluation of the Torsional VOR in Weightlessness

1993 ◽  
Vol 3 (3) ◽  
pp. 207-218
Author(s):  
Andrew H. Clarke ◽  
Winfried Teiwes ◽  
Hans Scherer
Keyword(s):  
Head Movement ◽  
Angular Rate ◽  
Inertial Force ◽  
Semicircular Canals ◽  
Head Rotation ◽  
Video Data ◽  
Microgravity Conditions ◽  
Oculomotor Response ◽  
Roll Axis ◽  
Integrative Processing

The experimental concept and findings from a recent manned orbital spaceflight are described. Together with ongoing terrestrial and parabolic studies, the present experiment is intended to further our knowledge of the sensory integrative processing of information from the semicircular canals and the otolithic receptors, and to quantify the presumed otolithic adaptation to altered gravito-inertial force environments in a more reliable manner than to date. The experiment included measurement of the basic vestibulo-oculomotor response during active head rotation about each of the three orthogonal axes. Priority was given to the recording of ocular torsion, as elicited by head oscillation about the roll axis, and thus due to the concomitant stimulation of the semicircular canals and otolith receptors. Videooculography was employed for the measurement of eye movements; head movement was measured by three orthogonally arranged angular rate sensors and a triaxial linear accelerometer device. All signals were recorded synchronously on a video/data recorder. Preliminary results indicate alterations in the torsional VOR under zero-g conditions, suggesting an adaptive modification of the torsional VOR gain over the course of the 6-day orbital flight. In addition, the inflight test findings yielded discrepancies between intended and performed head movement indicating impairment in sensorimotor coordination under prolonged microgravity conditions.

The perception threshold of the vestibular Coriolis illusion

2021 ◽  
pp. 1-8
Author(s):  
Mark M.J. Houben ◽  
Arjan J.H. Meskers ◽  
Eric L. Groen
Keyword(s):  
Head Movement ◽  
Generalized Linear Model ◽  
Peak Velocity ◽  
Head Rotation ◽  
Velocity Model ◽  
Whole Body ◽  
Laboratory Studies ◽  
Perception Threshold ◽  
Spatial Disorientation ◽  
S Peak

BACKGROUND: The vestibular Coriolis illusion is a disorienting sensation that results from a transient head rotation about one axis during sustained body rotation about another axis. Although often used in spatial disorientation training for pilots and laboratory studies on motion sickness, little is known about the minimum required rotation rate to produce the illusion. OBJECTIVE: This study determined the perception threshold associated with the Coriolis illusion. METHODS: Nineteen participants performed a standardized pitching head movement during continuous whole-body yaw rotation at rates varying between 5 to 50 deg/s. The participants reported their motion sensation in relation to three hypothesized perception thresholds: 1) any sense of motion, 2) a sense of rotation, and 3) a sense of rotation and its direction (i.e., the factual Coriolis illusion). The corresponding thresholds were estimated from curves fitted by a generalized linear model. RESULTS: On average threshold 1 was significantly lower (8 deg/s) than thresholds 2 and 3. The latter thresholds did not differ from each other and their pooled value was 10 deg/s. CONCLUSIONS: The Coriolis illusion is perceived at yaw rates exceeding 10 deg/s using a pitching head movement with 40 deg amplitude and 55 deg/s peak velocity. Model analysis shows that this corresponds to an internal rotation vector of 6 deg/s. With this vector the Coriolis perception threshold can be predicted for any other head movement.

Head movement in human sound localization

2016 ◽  
Vol 140 (4) ◽  
pp. 2998-2998
Author(s):  
Hayato Sato ◽  
Masayuki Morimoto ◽  
Hiroshi Sato
Keyword(s):  
Sound Localization ◽  
Head Movement

scholarly journals The Effects of Head Movement and Accurate Proprioceptive Feedback in Training of Sound Localization

i-Perception ◽  
10.1068/ic865 ◽  
2011 ◽  
Vol 2 (8) ◽  
pp. 865-865
Author(s):  
Akio Honda ◽  
Hiroshi Shibata ◽  
Souta Hidaka ◽  
Jiro Gyoba ◽  
Yukio Iwaya ◽  
...  
Keyword(s):  
Sound Localization ◽  
Head Movement ◽  
Proprioceptive Feedback
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