Searched for: subject:"vestibular%5C+system"
(1 - 20 of 20)
document
Khalid, H. (author), Turan, O. (author), Bos, J.E. (author)
Subjective vertical (SV) conflict theory postulates that motion sickness is elicited in all situations that lead to a difference between the sensed and subjective verticals. The sensed vertical is Earth's gravity as perceived by human sense modalities; the subjective vertical is also Earth's gravity, but in accordance with the expectations of...
article 2011
document
Khalid, H. (author), Turan, O. (author), Bos, J.E. (author), Incecik, A. (author)
Subjective-vertical conflict theory (Bles et al., 1998) postulates that all motion sickness provoking situations are characterized by a condition in which the vertical (gravity) sensed by the visual, vestibular and non-vestibular proprioceptors are at variance with the subjective (expected) vertical. SV-conflict models have successfully been...
article 2011
document
Mert, A. (author), Bles, W. (author)
Introduction: In tilting trains partial alignment to the gravito-inertial force (GIF) in the curves seems to be the best tilt compensation to reduce the incidence of motion sickness. We investigated the effect of alignment to the GIF on the development of motion sickness during low-frequency horizontal motion. Methods: There were 12 healthy...
article 2011
document
Groen, E.L. (author), Bos, J.E. (author), TNO Defensie en Veiligheid (author)
In this study we describe a new approach to relate simulator sickness ratings with the main frequency component of the simulator motion mismatch, that is, the computed difference between the time histories of simulator motion and vehicle motion, respectively. During two driving simulator experiments in the TNO movingbase driving simulator—that...
article 2008
document
Nooij, S.A.E. (author), Bos, J.E. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)
Adaptation to a novel gravitational state involves adaptation of vestibular mediated responses, in particular those mediated by the otolith organs. The present paper investigates whether the orientation of Listing’s plane, which is under control of otolith signals, is affected by sustained exposure to hypergravity. Subjects were exposed to four...
article 2008
document
Bos, J.E. (author), Bles, W. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)
This paper deals with visual-vestibular interactions as these occur when viewing images, and may cause motion sickness. Some basic vestibular matters fundamental to motion sickness are highlighted, such as the observation that people without functioning inner ears do not get sick from motion, including visual motion. Furthermore, the subjective...
article 2008
document
Nooij, S.A.E. (author), Bos, J.E. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)
Prolonged exposure to hypergravity in a human centrifuge can lead to post-rotary spatial disorientation and motion sickness. These symptoms are mainly provoked by tilting head movements and resemble the Space Adaptation Syndrome. We hypothesized that the occurrence of these post-rotary effects might be related to changes in the velocity storage ...
article 2008
document
TNO Defensie en Veiligheid (author), Nooij, S.A.E. (author)
doctoral thesis 2008
document
Nooij, S.A.E. (author), Bos, J.E. (author), TNO Defensie en Veiligheid (author)
It has been found that sustained centrifugation on Earth may evoke sickness symptoms that are similar to those of the Space Adaptation Syndrome (SAS). As in SAS, incidence of this ‘Sickness Induced by Centrifugation’ (SIC) is about 50% and the symptoms are particularly evoked by head movements. By systematically varying the G-load and duration...
article 2007
document
Mert, A. (author), Bles, W. (author), Nooij, S.A.E. (author), TNO Defensie en Veiligheid (author)
Introduction: In motion sickness desensitization programs, the motion sickness provocative stimulus is often a forward bending of the trunk on a rotating chair, inducing Coriolis effects. Since respiratory relaxation techniques are applied successfully in these courses, we investigated whether these repetitive trunk movements by themselves may...
article 2007
document
Groen, E.L. (author), Wentink, M. (author), Valente Pais, A.R. (author), Mulder, M. (author), van Paassen, M.M. (author), TNO Defensie en Veiligheid (author)
Pilot perception models include detailed descriptions of the sensory dynamics involved in human spatial orientation. For example, the TNO Spatial Orientation model contains transfer functions of the visual and vestibular system (semicircular canals and otoliths). In our previous attempts to apply this model for the validation of simulator motion...
conference paper 2006
document
Wentink, M. (author), Bos, J.E. (author), Groen, E.L. (author), Hosman, R. (author), TNO Defensie en Veiligheid (author)
The goal of this paper is to give an overview and some practical examples of the Motion Perception Toolbox developed by TNO (Netherlands Organization for Applied Research) as a freeware Matlab Simulink library. The MPT library provides a documented set of building blocks that model human perception and are easily coupled to existing simulation...
conference paper 2006
document
Golding, J.F. (author), Bles, W. (author), Bos, J.E. (author), Haynes, T. (author), Gresty, M.A. (author), TNO Technische Menskunde (author)
Maneuvering in vehicles exposes occupants to low frequency forces (<1 Hz) which can provoke motion sickness. Hypothesis: Aligning with the tilting inertial resultant (gravity + imposed horizontal acceleration: gravito-inertial force (GIF)) may reduce motion sickness when tilting is either 'active' (self-initiated; Experiment 1) or 'passive' ...
article 2003
document
Groen, E.L. (author), Jenkin, H.L. (author), Howard, I.P. (author)
A tilted furnished room can induce strong visual reorientation illusions in stationary subjects. Supine subjects may perceive themselves upright when the room is tilted 90¦ so that the visual polarity axis is kept aligned with the subject. This -upright illusion' was used to induce roll tilt in a truly horizontal, but perceptually vertical,...
article 2002
document
Wertheim, A.H. (author), TNO Technische Menskunde (author)
Various annoyingly incorrect statements of Stoffregen & Bardy are corrected, for example, that perception researchers commonly use the term "absolute motion" to denote motion without any frame of reference, confuse earth-relative and gravity-relative motion, err with respect to the frame of reference implied by their subject is motion responses,...
article 2001
document
Bos, J.E. (author), Bles, W. (author), TNO Technische Menskunde (author)
In an attempt to predict the amount of motion sickness given any kind of motion stimulus, we describe a model using explicit knowledge of the vestibular system. First, the generally accepted conflict theory is restated in terms of a conflict between a vertical as perceived by the sense organs like the vestibular system, and the subjective...
article 1998
document
de Graaf, B. (author), Bles, W. (author), Bos, J.E. (author), TNO Technische Menskunde (author)
In an experiment with seventeen subjects interactions of visual roll motion stimuli and vestibular body tilt stimuli were examined in determining the subjective vertical. Interindi-vidual differences in weighting the visual information were observed, but in general visual and vestibular responses added in setting the vertical. Despite the...
article 1998
document
Vente, P.E.M. (author), Bos, J.E. (author), de Wit, G. (author), TNO Human Factors Research Institute (author)
A side effect of the prescription of prism glasses according to the principle of Utermöhlen to improve mechanical reading skills of certain types of learning disabled children, was the alleviation of car sickness. Besides a decrease in reported symptoms after prescription of these glasses, the effect is quantified by a decrease in estimated...
article 1998
document
Bles, W. (author), Groen, E.L. (author), Bos, J.E. (author), de Jong, J.M.V.B. (author), Lok, J. (author), TNO Technische Menskunde (author)
Five healthy subjects were submitted to sinusoidal lateral tilt (amplitude 25° at frequency of 0.2Hz) of the whole body, only the head, or only the trunk about a vertical (subject in upright position) and about a horizontal axis (subject in supine position). The ocular torsioation of the neck by manipulating only the trunk had a negligible...
article 1998
document
Bles, W. (author), de Graaf, B. (author), TNO Technische Menskunde (author)
The vestibular examination techniques are discussed which are currently used at TNO to examine subjects with severe motion sickness problems. It concerns the establish-ment of the amount of visual induction during examination in the tilting room and in the Ship Motion Simulator, as well as the susceptibility to the Intersensory Coriolis Stress...
bookPart 1995
Searched for: subject:"vestibular%5C+system"
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