Disruption of contralateral inferior parietal cortex by 1Hz repetitive TMS modulates body sway following unpredictable removal of sway-related fingertip feedback

Johannsen, L.; Hirschauer, Franziska; Stadler, Waltraud; Hermsdörfer, Joachim

doi:10.1016/j.neulet.2014.11.048

Cited by 15 publications

(14 citation statements)

References 22 publications

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“…In our present study, the general progression of sway during a contact removal transition is in line with the previous study of Johannsen et al [4]. They showed that short contact durations initiate a reduction in sway but do not result in a significant reduction.…”

Section: Discussionsupporting

confidence: 93%

“…As we tested right-handed participants it implies that the dominant left hemisphere is involved in this strategy. In a previous study, we observed that disruption of the left-hemisphere inferior parietal gyrus (IPG) by repetitive transcranial magnetic stimulation (rTMS) inhibited sway overshoot following unexpected, passive removal of light contact [4]. This could mean that the left IPG plays a role in the detection of multisensory conflict or the directing of tactile attention.…”

Section: Discussionmentioning

confidence: 98%

“…In a previous study Johannsen et al (2014) demonstrated longer return-to-baseline of body sway for intermittent contacts of more than 2 seconds duration. This indicates that sway reduction with light tactile contact involves postural control strategies independent of the availability of tactile feedback and may depend on the intention to control body sway with light touch feedback.…”

mentioning

confidence: 84%

“…Only a few studies have addressed the time course of sway before and after a contact transition [2,3,4]. Sway stabilization with light touch is a time-consuming integrative and attention demanding process [2,3,5].…”

Section: Introductionmentioning

confidence: 99%

“…Schiepatti and colleagues [8] proposed that transient anticipatory processes are involved in the preparation of the central postural set to the context of stance control with light contact. Investigating intermittent touch with only short contact durations, Johannsen et al (2014) demonstrated that contact durations of more than 2 s result in slower recovery of reduced sway to baseline levels after contact removal. These observations indicate that the integration of fingertip contact requires no less than about 2 seconds and is likely to involve not only bottom-up sensory processing but also top-down, "intentional" control of body sway and tactile attention.…”

Section: Introductionmentioning

confidence: 99%

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Consolidation of the postural set during voluntary intermittent light finger contact as a function of hand dominance

Kaulmann

Chen

Johannsen

2017

2017 IEEE World Haptics Conference (WHC)

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Abstract-Light fingertip contact with an earth-fixed referent decreases body sway. In a previous study Johannsen et al. (2014) demonstrated longer return-to-baseline of body sway for intermittent contacts of more than 2 seconds duration. This indicates that sway reduction with light tactile contact involves postural control strategies independent of the availability of tactile feedback and may depend on the intention to control body sway with light touch feedback. In the present study, we investigated the effect of hand dominance on post-contact return-to-baseline to probe for potential inter-hemispheric differences in the utilization of light finger contact for sway control. Twelve healthy, right-handed young adults stood in normal bipedal stance with eyes closed on a force plate with an earth-fixed referent directly in front. Acoustic signals instructed onset and removal of intermittent light touch. We found that return-to-baseline of sway following longer contact durations is affected by hand dominance with the dominant hand resulting in a slower return to No-contact levels of sway. Our results indicate that the light touch postural set is more persistent and might need longer to disengage when established with the dominant hand or takes longer to consolidate when established with the non-dominant hand.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 98%

mentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Consolidation of the postural set during voluntary intermittent light finger contact as a function of hand dominance

Kaulmann

Chen

Johannsen

2017

2017 IEEE World Haptics Conference (WHC)

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Noninvasive Brain Stimulation to Reduce Falls in Older Adults

Manor

Zhou

et al. 2019

Falls and Cognition in Older Persons

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EEG frequency analysis of cortical brain activities induced by effect of light touch

et al. 2016

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In human postural control, touching a fingertip to a stable object with a slight force (<1 N) reduces postural sway independent of mechanical support, which is referred to as the effect of light touch (LT effect). The LT effect is achieved by the spatial orientation according to haptic feedback acquired from an external spatial reference. However, the neural mechanism of the LT effect is incompletely understood. Therefore, the purpose of this study was to employ EEG frequency analysis to investigate the cortical brain activity associated with the LT effect when attentional focus was strictly controlled with the eyes closed during standing (i.e., control, fixed-point touch, sway-referenced touch, and only fingertip attention). We used EEG to measure low-alpha (about 8-10 Hz) and high-alpha rhythm (about 10-12 Hz) task-related power decrease/increase (TRPD/TRPI). The LT effect was apparent only when the subject acquired the stable external spatial reference (i.e., fixed-point touch). Furthermore, the LT-specific effect increased the high-alpha TRPD of two electrodes (C3, P3), which were mainly projected from cortical brain activities of the left primary sensorimotor cortex area and left posterior parietal cortex area. Furthermore, there was a negative correlation between the LT effect and increased TRPD of C3. In contrast, the LT effect correlated positively with increased TRPD of P3. These results suggest that central and parietal high-alpha TRPD of the contralateral hemisphere reflects the sensorimotor information processing and sensory integration for the LT effect. These novel findings reveal a partial contribution of a cortical neural mechanism for the LT effect.

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Disruption of contralateral inferior parietal cortex by 1Hz repetitive TMS modulates body sway following unpredictable removal of sway-related fingertip feedback

Cited by 15 publications

References 22 publications

Consolidation of the postural set during voluntary intermittent light finger contact as a function of hand dominance

Consolidation of the postural set during voluntary intermittent light finger contact as a function of hand dominance

Noninvasive Brain Stimulation to Reduce Falls in Older Adults

EEG frequency analysis of cortical brain activities induced by effect of light touch

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