Effect and immediate after-effect of lightly gripping the cane on postural sway

Oshita, Kazushige; Yano, Sumio

doi:10.1186/s40101-016-0096-4

Cited by 17 publications

(8 citation statements)

References 18 publications

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“…Here, we used a cane as a way for decreasing body sway during eyes-closed stance. This tool proved to be effective for stabilization, even when the cane exerted <1 N force on the ground, and even when the cane was not fixed to the ground, as in other investigations on this issue (Jeka et al, 1996 ; Maeda et al, 1998 ; Albertsen et al, 2010 ; Ustinova and Langenderfer, 2013 ; Oshita and Yano, 2016 ). Of note, the experiments were conducted under tandem stance, which is a challenging sway situation (Sozzi et al, 2013 ), in order to clearly detect differences between the condition with/without cane touch.…”

Section: Discussionsupporting

confidence: 58%

Haptic Cues for Balance: Use of a Cane Provides Immediate Body Stabilization

Sozzi

Crisafulli

Schieppati³

2017

Front. Neurosci.

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Haptic cues are important for balance. Knowledge of the temporal features of their effect may be crucial for the design of neural prostheses. Touching a stable surface with a fingertip reduces body sway in standing subjects eyes closed (EC), and removal of haptic cue reinstates a large sway pattern. Changes in sway occur rapidly on changing haptic conditions. Here, we describe the effects and time-course of stabilization produced by a haptic cue derived from a walking cane. We intended to confirm that cane use reduces body sway, to evaluate the effect of vision on stabilization by a cane, and to estimate the delay of the changes in body sway after addition and withdrawal of haptic input. Seventeen healthy young subjects stood in tandem position on a force platform, with eyes closed or open (EO). They gently lowered the cane onto and lifted it from a second force platform. Sixty trials per direction of haptic shift (Touch → NoTouch, T-NT; NoTouch → Touch, NT-T) and visual condition (EC-EO) were acquired. Traces of Center of foot Pressure (CoP) and the force exerted by cane were filtered, rectified, and averaged. The position in space of a reflective marker positioned on the cane tip was also acquired by an optoelectronic device. Cross-correlation (CC) analysis was performed between traces of cane tip and CoP displacement. Latencies of changes in CoP oscillation in the frontal plane EC following the T-NT and NT-T haptic shift were statistically estimated. The CoP oscillations were larger in EC than EO under both T and NT (p < 0.001) and larger during NT than T conditions (p < 0.001). Haptic-induced effect under EC (Romberg quotient NT/T ~ 1.2) was less effective than that of vision under NT condition (EC/EO ~ 1.5) (p < 0.001). With EO cane had little effect. Cane displacement lagged CoP displacement under both EC and EO. Latencies to changes in CoP oscillations were longer after addition (NT-T, about 1.6 s) than withdrawal (T-NT, about 0.9 s) of haptic input (p < 0.001). These latencies were similar to those occurring on fingertip touch, as previously shown. Overall, data speak in favor of substantial equivalence of the haptic information derived from both “direct” fingertip contact and “indirect” contact with the floor mediated by the cane. Cane, finger and visual inputs would be similarly integrated in the same neural centers for balance control. Haptic input from a walking aid and its processing time should be considered when designing prostheses for locomotion.

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Section: Discussionsupporting

confidence: 58%

Haptic Cues for Balance: Use of a Cane Provides Immediate Body Stabilization

Sozzi

Crisafulli

Schieppati³

2017

Front. Neurosci.

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“…Jeka and Lackner [ 15 ] showed a reducing effect of the light fingertip contact to a stationary surface on postural sway and muscle activity during bipedal tandem stance. Moreover, Ohsihita and Yano [ 16 ] measured EMG of TA and gastrocnemius during SLS with light gripping of a cane according to the previous report that a light touch effect is also observed for light grasping of an unstable object [ 34 ]. The authors then calculated CI based on the study by Rudolph et al [ 35 ] and showed a smaller CI with the lightly gripping of the cane during SLS than without the cane.…”

Section: Discussionmentioning

confidence: 99%

“…Jeka and Lackner [ 15 ] showed that the light fingertip contact to stationary surface leads to decreased levels of EMG activity of the lower limb during bipedal standing in young people. Moreover, a light gripping cane leads to decreased muscle co-contraction during SLS in young people [ 16 ]. These findings demonstrated the possibility the haptic sensory information with the light fingertip contact might decrease muscle co-contraction of the ankle joint during SLS even in elderly people.…”

Section: Introductionmentioning

confidence: 99%

Muscle co-contraction in elderly people change due to postural stability during single-leg standing

Iwamoto

Takahashi

Shinkoda

2017

J Physiol Anthropol

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BackgroundMuscle co-contraction is the simultaneous contraction of agonist and antagonist muscles crossing a joint, and it increases with age. This study primarily aimed to clarify the difference in the effect of a light fingertip contact to stationary surface on postural sway and muscle co-contraction during single-leg standing (SLS) between young and elderly groups; the secondary aim was to reveal the quantitative difference in the muscle co-contraction of the ankle joint among the three different support structure conditions in the elderly group.MethodsThis study included eight young adults (age 23.4 ± 2.6 years) and nine community dwelling older adults (age 74.7 ± 3.4 years). The task was SLS under the following conditions: (1) no supporting structure, FR; (2) light index fingertip contact to a stationary supporting structure (to touch in force < 1 N), LT; and (3) dependence on a supporting structure for stabilization as desired, DO. Center of pressure (COP) variables [root-mean-square distance (RDIST), total excursion (TOTEX), mean velocity (MVELO), and standard deviation area (AREA-SD)] and the co-contraction index (CI) between the tibialis anterior and soleus were measured using surface electromyography.ResultsWith regard to the effect of the light fingertip contact to stationary surface, in the young group, TOTEX, MVELO, AREA-SD, and CI during SLS were smaller under the LT condition than under the FR condition. However, in the elderly group, only AREA-SD and CI were smaller under the LT condition than under the FR condition. No significant difference was observed in COP variables and CI under the DO condition between the young and elderly groups.ConclusionBoth young and elderly groups could decrease muscle co-contraction using the light fingertip contact. On the other hand, in the elderly group, COP variables showed a limited effect from the light fingertip contact; only the “sway” domain measure (AREA-SD). Both young and elderly groups showed the smallest CI under the DO condition. Therefore, the elderly group could decrease muscle co-contraction of the ankle joint depending on postural stability.

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“…For example, our participants might have been more used to explore the environment with their dominant hand. An aftereffect on postural sway following an extended duration of lightly gripping a cane was reported by Oshita and Yano [14]. They investigated the effect of lightly touching a cane on postural sway and ankle-joint muscle activity.…”

Section: Discussionmentioning

confidence: 99%

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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Effect and immediate after-effect of lightly gripping the cane on postural sway

Cited by 17 publications

References 18 publications

Haptic Cues for Balance: Use of a Cane Provides Immediate Body Stabilization

Haptic Cues for Balance: Use of a Cane Provides Immediate Body Stabilization

Muscle co-contraction in elderly people change due to postural stability during single-leg standing

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

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