Characteristics of postural control during fixed light-touch and interpersonal light-touch contact and the involvement of interpersonal postural coordination

Ishigaki, Tomoya; Yamamichi, Nami; Ueta, Kozo; Morioka, Shigefumi

doi:10.1016/j.humov.2021.102909

Cited by 3 publications

(4 citation statements)

References 31 publications

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“…Interestingly, an increase in the CI of the left and right TA-SOL was observed in the medium term. Previous reports are contradictory, with some affirming that the light touch effect decreases co-contraction of lower leg muscle activity along with reduction of the center of gravity sway [ 25 , 26 ], and others reporting that light touch to a fixed object increases co-contraction [ 27 ]. In the present case, an initial overcontraction of the right TA muscle occurred to compensate for the ataxia of the left lower extremity, resulting in a low CI with the SOL muscle.…”

Section: Discussionmentioning

confidence: 99%

Changes in Standing Postural Control Ability in a Case of Spinocerebellar Ataxia Type 31 With Physical Therapy Focusing on the Center of Gravity Sway Variables and Lower Leg Muscle Activity

Iwasa,

Akaguchi,

Okuno

et al. 2023

Cureus

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Spinocerebellar degeneration (SCD) is a progressive disease characterized by cerebellar ataxia or the posterior spinal cord. Among these, spinocerebellar ataxia type 31 (SCA31) is genetically more common in the Japanese population and is characterized by pure ataxia, resulting in severe disturbances in postural balance, with common falls. Therefore, rehabilitation is important to improve postural balance. Light touch is a known method of reducing postural sway, which acts with the light touching of an object with the body. We herein present a case of a patient with SCA31 who was trained in a standing position by lightly touching the back of the body to a wall surface. Dynamic interarticular coordination exercises were also performed as part of the rehabilitation program. As a result, even in the progressive SCA31, improvements in standing postural balance and activities of daily living contributed to improvements in the patient's postural balance. We followed the progress of postural control ability using the center of gravity sway measurement and electromyography and described some interesting characteristics of the patient's postural control ability in this report.

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Section: Discussionmentioning

confidence: 99%

Changes in Standing Postural Control Ability in a Case of Spinocerebellar Ataxia Type 31 With Physical Therapy Focusing on the Center of Gravity Sway Variables and Lower Leg Muscle Activity

Iwasa,

Akaguchi,

Okuno

et al. 2023

Cureus

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“…This suggests that the body sway is stabilized by interpersonal touch, which is consistent with previous studies [ 7 , 9 ]. Notably, this stabilization was observed for both A-participants and P-participants: Stabilization occurred when A-participants lightly touched P-participants, as in the situation when two participants symmetrically touch each other [ 8 , 9 ]. We also showed that, in the light touch condition, the correlation peak was located at a time shift of approximately 300 ms ( Fig 6 ).…”

Section: Methodsmentioning

confidence: 99%

“…The second experiment was performed to examine the effect of the SR maneuver on the interpersonal correlation of COP motions when two persons are contacted either by close contact or by a light touch. Previous studies have shown that the COP motions are mutually correlated when two persons are contacted even by a light touch [8][9][10][11]. This means that that haptic information alone (i.e., even without physical force) can modulate the controls of quiet stance of two persons.…”

Section: Methodsmentioning

confidence: 99%

“…Human postural sway is greatly reduced by touching an external object, even lightly with a fingertip (light touch effect) [4,5]. When a person touches a moving object, postural sway is synchronized with its motion [6,7], and the postural sways of two individuals are correlated with each other when one lightly touches the other [8][9][10][11] (interpersonal light-touch effect). These findings indicate that humans use haptic information for postural control and deal with the touched object as a reference.…”

Section: Introductionmentioning

confidence: 99%

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Effects of a body manipulation of Japanese martial arts on interpersonal correlation of postural sway

Watanabe

Sugita

2022

PLoS ONE

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This study aimed to investigate the nature of a specific body manipulation named Suichoku-Ririku (SR) in Japanese martial arts. SR is regarded as a method to change the way of stance and to distort the balance control of the opponent, but its nature and mechanism are unknown. In the present study, we attempted to determine the effect of SR in the cases that a person stood alone (Expt. 1) and that two persons stood in contact (Expt. 2). We compared several center of pressure (COP) measures between the normal stance and SR stance conditions. When participants stood independently (Expt. 1), the COP path length, standard deviation of COP velocity and permutation entropy of the COP increased with the SR stance, which suggested that the SR maneuver destabilized a quiet stance. When two participants stood (with normal stance) in contact by wrist-holding or by a light touch (Expt. 2), their COP motions were correlated with each other, as previously reported. When one of the participants took the SR maneuver, their correlation and mutual information were maintained, denying the view that SR would diminish the interpersonal correlation of body sway. On the other hand, a fluctuation in the COP increased only for the participant taking the SR maneuver, and not for the other participant. This asymmetric effect of the SR maneuver between two participants, irrespective of maintained mutual correlation, suggest that the relationship between balance controls of two participants was partly disrupted. We discuss possible mechanisms for the present results.

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Effects of passive interpersonal light touch during walking on postural control responses: An exploratory study

Mitsutake

Taniguchi

Fujita

et al. 2023

Human Movement Science

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Characteristics of postural control during fixed light-touch and interpersonal light-touch contact and the involvement of interpersonal postural coordination

Cited by 3 publications

References 31 publications

Changes in Standing Postural Control Ability in a Case of Spinocerebellar Ataxia Type 31 With Physical Therapy Focusing on the Center of Gravity Sway Variables and Lower Leg Muscle Activity

Changes in Standing Postural Control Ability in a Case of Spinocerebellar Ataxia Type 31 With Physical Therapy Focusing on the Center of Gravity Sway Variables and Lower Leg Muscle Activity

Effects of a body manipulation of Japanese martial arts on interpersonal correlation of postural sway

Effects of passive interpersonal light touch during walking on postural control responses: An exploratory study

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