The effect factors of motion sickness induced by sensory conflict and posture instability theories

2022 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Yu Hsiang Shih ◽  
Huey Min Sun ◽  
Yung Cheng Chen
Keyword(s):  
Motion Sickness ◽  
Effect Factors ◽  
Sensory Conflict

scholarly journals Contribution of intravestibular sensory conflict to motion sickness and dizziness in migraine disorders

2016 ◽  
Vol 116 (4) ◽  
pp. 1586-1591 ◽  
Author(s):  
Joanne Wang ◽  
Richard F. Lewis
Keyword(s):  
Motion Sickness ◽  
Semicircular Canals ◽  
Inverse Correlation ◽  
Normal Subjects ◽  
Otolith Organs ◽  
Rotational Axis ◽  
Vestibuloocular Reflex ◽  
Sensory Conflict ◽  
Velocity Signal ◽  
Episodic Vertigo

Migraine is associated with enhanced motion sickness susceptibility and can cause episodic vertigo [vestibular migraine (VM)], but the mechanisms relating migraine to these vestibular symptoms remain uncertain. We tested the hypothesis that the central integration of rotational cues (from the semicircular canals) and gravitational cues (from the otolith organs) is abnormal in migraine patients. A postrotational tilt paradigm generated a conflict between canal cues (which indicate the head is rotating) and otolith cues (which indicate the head is tilted and stationary), and eye movements were measured to quantify two behaviors that are thought to minimize this conflict: suppression and reorientation of the central angular velocity signal, evidenced by attenuation (“dumping”) of the vestibuloocular reflex and shifting of the rotational axis of the vestibuloocular reflex toward the earth vertical. We found that normal and migraine subjects, but not VM patients, displayed an inverse correlation between the extent of dumping and the size of the axis shift such that the net “conflict resolution” mediated through these two mechanisms approached an optimal value and that the residual sensory conflict in VM patients (but not migraine or normal subjects) correlated with motion sickness susceptibility. Our findings suggest that the brain normally controls the dynamic and spatial characteristics of central vestibular signals to minimize intravestibular sensory conflict and that this process is disrupted in VM, which may be responsible for the enhance motion intolerance and episodic vertigo that characterize this disorder.

Modeling sensory conflict and motion sickness in artificial gravity

2008 ◽  
Vol 62 (2-3) ◽  
pp. 224-231 ◽  
Author(s):  
Paul Z. Elias ◽  
Thomas Jarchow ◽  
Laurence R. Young
Keyword(s):  
Motion Sickness ◽  
Artificial Gravity ◽  
Sensory Conflict

Visual Occlusion Decreases Motion Sickness in a Flight Simulator

Perception ◽  
2018 ◽  
Vol 47 (5) ◽  
pp. 521-530 ◽  
Author(s):  
Shaziela Ishak ◽  
Andrea Bubka ◽  
Frederick Bonato
Keyword(s):  
Motion Sickness ◽  
Conflict Theory ◽  
Visual Input ◽  
Simulator Sickness ◽  
Motion Platform ◽  
Visual Channel ◽  
Sensory Conflict ◽  
Sensory Inputs ◽  
Visual Occlusion ◽  
Before And After

Sensory conflict theories of motion sickness (MS) assert that symptoms may result when incoming sensory inputs (e.g., visual and vestibular) contradict each other. Logic suggests that attenuating input from one sense may reduce conflict and hence lessen MS symptoms. In the current study, it was hypothesized that attenuating visual input by blocking light entering the eye would reduce MS symptoms in a motion provocative environment. Participants sat inside an aircraft cockpit mounted onto a motion platform that simultaneously pitched, rolled, and heaved in two conditions. In the occluded condition, participants wore “blackout” goggles and closed their eyes to block light. In the control condition, participants opened their eyes and had full view of the cockpit’s interior. Participants completed separate Simulator Sickness Questionnaires before and after each condition. The posttreatment total Simulator Sickness Questionnaires and subscores for nausea, oculomotor, and disorientation in the control condition were significantly higher than those in the occluded condition. These results suggest that under some conditions attenuating visual input may delay the onset of MS or weaken the severity of symptoms. Eliminating visual input may reduce visual/nonvisual sensory conflict by weakening the influence of the visual channel, which is consistent with the sensory conflict theory of MS.

Motion sickness: a synthesis and evaluation of the sensory conflict theory

1990 ◽  
Vol 68 (2) ◽  
pp. 294-303 ◽  
Author(s):  
Charles M. Oman
Keyword(s):  
Motion Sickness ◽  
General Term ◽  
Conflict Theory ◽  
Control Engineering ◽  
Sensory Conflict ◽  
Physical Motion ◽  
Vestibular Organs ◽  
The Brain ◽  
Neurophysiological Basis ◽  
Present Understanding

"Motion sickness" is the general term describing a group of common nausea syndromes originally attributed to motion-induced cerebral ischemia, stimulation of abdominal organ afferents, or overstimulation of the vestibular organs of the inner ear. Seasickness, car sickness, and airsickness are commonly experienced examples. However, the identification of other variants such as spectacle sickness and flight simulator sickness in which the physical motion of the head and body is normal or even absent has led to a succession of "sensory conflict" theories that offer a more comprehensive etiologic perspective. Implicit in the conflict theory is the hypothesis that neural and (or) humoral signals originate in regions of the brain subserving spatial orientation, and that these signals somehow traverse to other centers mediating sickness symptoms. Unfortunately, our present understanding of the neurophysiological basis of motion sickness is incomplete. No sensory conflict neuron or process has yet been physiologically identified. This paper reviews the types of stimuli that cause sickness and synthesizes a mathematical statement of the sensory conflict hypothesis based on observer theory from control engineering. A revised mathematical model is presented that describes the dynamic coupling between the putative conflict signals and nausea magnitude estimates. Based on the model, what properties would a conflict neuron be expected to have?Key words: motion sickness, nausea, vestibular, vision, mathematical models.

scholarly journals Managing the resilience of future marine specialists to sickness

2020 ◽  
pp. 112-117
Author(s):  
А.А. Зайцев ◽  
А.А. Зайцева ◽  
Н.К. Полещук
Keyword(s):  
Sustainable Development ◽  
Motion Sickness ◽  
Dynamic Balance ◽  
Sensory Conflict ◽  
The Sustainable Development ◽  
Training Cycle ◽  
Sufficient Set ◽  
Total Acceleration ◽  
Acceleration Of Gravity ◽  
Selection Of

В статье приводится обоснование условий тренировки устойчивости к укачиванию будущих морских специалистов, способствующих снижению объемов нагрузки в специальных упражнениях и временных затрат на цикл подготовки. Предложен способ расчета перегрузок в упражнениях, применяемых в активной, пассивной и смешанной тренировках устойчивости к укачиванию. Значение критерия определяется путем вычисления отношения полного ускорения, действующего на вестибулярный анализатор в процессе движения, к ускорению свободного падения. Установлено, что ведущей теорией для отбора средств тренировки является теория сенсорного конфликта. Дается описание и обоснование применения авторских разработок для тренировки статического и динамического равновесия на возвышенной, наклонной, качающейся и соскальзывающей опорах, моделирующих условия сохранения статокинетической устойчивости в морских условиях. Предложен необходимый и достаточный комплекс технических устройств и тренажеров для управления устойчивостью будущих морских специалистов к укачиванию. The article substantiates the conditions of resistance to motion sickness of future marine specialists, the possibilities of the system for measuring the load in special exercises and the time spent on the training cycle. A method for calculating overloads in exercises used in active, passive and mixed trainings of resistance to motion sickness is proposed. The value is determined by calculating the ratio of the total acceleration acting on the vestibular analyzer during the acceleration of gravity. It has been established that the leading theory for the selection of training means is the theory of sensory conflict. A description and justification of the use of author's developments for training static and dynamic balance on an elevated, inclined, swinging and sliding support, simulating the conditions for maintaining statokinetic stability in marine conditions, is given. The necessity and a sufficient set of technical devices and simulators for the sustainable development of marine specialists for motion sickness is proposed.

Modeling Sensory Conflict and Motion Sickness in A...

2005 ◽  
Author(s):  
Paul Z. Elias ◽  
Thomas Jarchow ◽  
Laurence R. Young
Keyword(s):  
Motion Sickness ◽  
Sensory Conflict
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