Individuals with a vestibular-related disorder use a somatosensory-dominant strategy for postural orientation after inclined stance

Chong, Raymond; Berl, B.; Cook, Barton B.; Turner, Paul; Walker, Kimberly

doi:10.1111/ane.12658

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…To identify differences in postural adaptation resulting from tDCS of the PPC, this investigation utilized an incline-intervention adaptation paradigm. Incline-interventions involve prolonged stance on an inclined surface and result in a postural after-effect known as lean after-effect (LAE), which is an anterior shift in position that can persist for several minutes (Kluzik et al, 2005 ; Chong et al, 2014 , 2017 ). Lean after-effect reflects a change in the internal relationship between gravitational vertical and elected postural orientation.…”

Section: Introductionmentioning

confidence: 99%

Non-invasive Brain Stimulation of the Posterior Parietal Cortex Alters Postural Adaptation

Young

Parikh

Layne

2020

Front. Hum. Neurosci.

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Section: Introductionmentioning

confidence: 99%

Non-invasive Brain Stimulation of the Posterior Parietal Cortex Alters Postural Adaptation

Young

Parikh

Layne

2020

Front. Hum. Neurosci.

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“…Increased influence of the somatosensory system was also suggested in individuals with a vestibular-related disorder. Following prolonged stance on an inclined surface, all the participants in the study displayed the lean aftereffect ( Chong et al, 2016 ). We are studying individuals with somatosensory loss to further understand the source(s) of the aftereffect.…”

Section: Discussionmentioning

confidence: 99%

“…In the inclined stance protocol, there is also evidence that some participants may have been aware of their lean aftereffect and countered it by attempting to stand upright ( Kluzik et al, 2005 ; Regia-Corte and Wagman, 2008 ; Chong et al, 2016 ). Whether this was done consciously is part of what will be investigated in the current study.…”

Section: Introductionmentioning

confidence: 99%

Two Mechanisms of Sensorimotor Set Adaptation to Inclined Stance

Lee¹,

Baksh

Bryant

et al. 2017

Front. Hum. Neurosci.

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Orientation of posture relative to the environment depends on the contributions from the somatosensory, vestibular, and visual systems mixed in varying proportions to produce a sensorimotor set. Here, we probed the sensorimotor set composition using a postural adaptation task in which healthy adults stood on an inclined surface for 3 min. Upon returning to a horizontal surface, participants displayed a range of postural orientations – from an aftereffect that consisted of a large forward postural lean to an upright stance with little or no aftereffect. It has been hypothesized that the post-incline postural change depends on each individual’s sensorimotor set: whether the set was dominated by the somatosensory or vestibular system: Somatosensory dominance would cause the lean aftereffect whereas vestibular dominance should steer stance posture toward upright orientation. We investigated the individuals who displayed somatosensory dominance by manipulating their attention to spatial orientation. We introduced a distraction condition in which subjects concurrently performed a difficult arithmetic subtraction task. This manipulation altered the time course of their post-incline aftereffect. When not distracted, participants returned to upright stance within the 3-min period. However, they continued leaning forward when distracted. These results suggest that the mechanism of sensorimotor set adaptation to inclined stance comprises at least two components. The first component reflects the dominant contribution from the somatosensory system. Since the postural lean was observed among these subjects even when they were not distracted, it suggests that the aftereffect is difficult to overcome. The second component includes a covert attentional component which manifests as the dissipation of the aftereffect and the return of posture to upright orientation.

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“…The visual system provides immediate cues about the surrounding world whereas the vestibular system provides information regarding acceleration and head movement. Even more complex is postural control, which is achieved through an intricate interface of visual, vestibular, and somatosensory cues (Harris, Sakurai, & Beaudot, 2017 Turner, & Walker (2017) found that individuals with a vestibular disorder relied heavier on somatosensory cues, indicating a compensatory adaptation to a maladaptive vestibular system.…”

Section: E: the Vestibular System And Somatosensory Interactionsmentioning

confidence: 99%

The effects of a physical activity program called "minds-in-motion-the maze" on balance and motor skills in middle school aged students.

Vargas¹

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Individuals with a vestibular-related disorder use a somatosensory-dominant strategy for postural orientation after inclined stance

Abstract: Individuals with a vestibular-related disorder use a somatosensory-dominant strategy for postural orientation following prolonged inclined stance. The implications for the management of this population are discussed.

Cited by 6 publications

References 28 publications

Non-invasive Brain Stimulation of the Posterior Parietal Cortex Alters Postural Adaptation

Non-invasive Brain Stimulation of the Posterior Parietal Cortex Alters Postural Adaptation

Two Mechanisms of Sensorimotor Set Adaptation to Inclined Stance

The effects of a physical activity program called "minds-in-motion-the maze" on balance and motor skills in middle school aged students.

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