Vestibular modulation of muscle sympathetic nerve activity by the utricle during sub-perceptual sinusoidal linear acceleration in humans

Hammam, Elie; Hau, Chui Luen Vera; Wong, Kwok-Shing; Kwok, Kenny; Macefield, Vaughan G.

doi:10.1016/j.autneu.2015.07.191

Cited by 3 publications

(4 citation statements)

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“…24 Regardless of the exact scenario, the fact that sympathomimetics like dextroamphetamine reduce MS symptoms while parasympathetic blockers such as cholinergic (muscarinic) antagonists attenuate MS-induced vomiting clearly supports the role of parasympathetic dominance in MS. 103 The role of the vestibular system in autonomic control is also complex and remains controversial in some areas. On the basis of a wide range of evidence, including effects on blood pressure 51,111 and sympathetic muscle activity, 14,44,51 Yates et al 105 concluded that the otoliths have a primarily sympathetic influence on cardiovascular output, which makes sense in that changes in head position relative to gravity are sensed primarily by the otolith organs and they, in turn, send a signal to boost cardiac output before blood pressure drops are detected by the baroreceptors. 105 The canals do not appear to mediate the vestibulo-sympathetic response 82 and, if anything, may exert more of a parasympathetic influence.…”

Section: Why Intravestibular Balance May Cause Motion Sicknessmentioning

confidence: 99%

Intravestibular Balance and Motion Sickness

Previc

2018

aerosp med hum perform

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Section: Why Intravestibular Balance May Cause Motion Sicknessmentioning

confidence: 99%

Intravestibular Balance and Motion Sickness

Previc

2018

aerosp med hum perform

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“…within the vestibular apparatus) in providing information on motion in the absence of visual cues [9,21]. Accordingly, we reject the two hypotheses we set out to test.…”

Section: Discussionmentioning

confidence: 80%

“…We have used this method previously to study vestibulo-sympathetic reflexes in able-bodied subjects [9], but it proved too difficult to recruit suitable participants for a laboratorybased study -hence the current study design. Our original aim was to recruit a sufficient number of individuals with spinal cord injury, seated on a motorized platform, and expose them to lowfrequency sinusoidal linear acceleration.…”

Section: Limitationsmentioning

confidence: 99%

Susceptibility to motion sickness is not increased following spinal cord injury

Macefield

Walton

2015

VES

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BACKGROUND: There are two leading theories on the origin of motion sickness. One, the sensory conflict theory, states that sensory information provided by one sensory channel does not match the expected input from another channel; commonly, these two inputs originate in the vestibular system and the eyes. The second theory -the postural instability theory -states that motion sickness comes about not through sensory conflict, but through an inability to control one's posture. OBJECTIVE: Given that people with a motor-complete spinal cord injury cannot control their muscles below the level of the spinal lesion, we predicted that susceptibility to motion sickness would be higher in individuals who have suffered a spinal cord injury. METHODS: Twenty-one people living with chronic spinal cord injury (9 quadriplegics, 12 paraplegics) completed the Motion Sickness Susceptibility Questionnaire (MSSQ), via an online survey, to compare susceptibility to motion sickness before and after injury. RESULTS: Spinal cord injury, regardless of level, did not produce an increase in susceptibility to motion sickness. CONCLUSION: We have tested the general validity of the postural-instability theory by assessing susceptibility to motion sickness in individuals with spinal cord injury. Despite the loss of postural control, there was no increase in motion sickness susceptibility.

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“…There is evidence in the literature showing that vibrations can be perceptible but still acceptable, not adversely affecting performance and well-being (Burton, 2006;Denoon et al, 2000;Jeary et al, 1988). The opposite scenario can also be true where a sub-perceptible motion can be potentially unacceptable due to adverse effects on human (Hammam et al, 2014). Moreover, acceptability is © ASCE context dependent i.e.…”

Section: Introductionmentioning

confidence: 99%

Moving from Human Perception to Acceptability: A Paradigm Shift in Vibration Serviceability Assessment of Tall Buildings

Heshmati¹,

Shahabpoor²,

Darby

et al. 2020

Structures Congress 2020

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The current vibration serviceability assessment (VSA) criteria for wind-induced vibrations in tall buildings is based largely on human perception threshold which is not necessarily translatable to human 'acceptability' of vibration. Therefore, issues such as the effects of windinduced motions on occupants comfort, work performance, motion sickness, and sopite syndrome are not taken into account in current VSA guidelines. This paper provides an overview of the characteristics of wind-induced vibrations, state-of-the-art VSA guidelines, and the current understanding of occupants' acceptability of wind-induced motion in tall buildings. The VSimulators facility in the Universities of Bath and Exeter to assess the effects of motion and environment on human is introduced. This facility enables in-depth research in this field through controlled simulation of structural motion and the environment and multi-modal measurement of human reactions.

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Vestibular modulation of muscle sympathetic nerve activity by the utricle during sub-perceptual sinusoidal linear acceleration in humans

Cited by 3 publications

References 0 publications

Intravestibular Balance and Motion Sickness

Intravestibular Balance and Motion Sickness

Susceptibility to motion sickness is not increased following spinal cord injury

Moving from Human Perception to Acceptability: A Paradigm Shift in Vibration Serviceability Assessment of Tall Buildings

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