Postural readjustment to body sway induced by vibration in man

Hayashi, Ryoichi; Miyake, Akimitsu; Jijiwa, Hiroyasu; Watanabe, Satoru

doi:10.1007/bf00237767

Cited by 49 publications

(19 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This unusual barrage of the CNS by action potentials from peripheral sensory organs leads to a host of sensory-motor events, which include reflex contraction of muscles (tonic vibration reflex, Eklund and Hagbarth 1966) both in the area of vibration application and in relatively remote areas of the body (Gurfinkel and Latash 1979), kinesthetic illusions (commonly the muscle directly subjected to vibration is perceived as being stretched, Lackner and Levine 1979; Roll et al 1989), postural disturbances (vibration-induced fallings, Eklund and Hagbarth 1967; Hayashi et al 1981), and interactions with other reflexes, partly due to the increased presynaptic inhibition of primary afferent projections on alpha-motoneurons (Gillies et al 1969; Desmedt and Godaux 1978). Vibration can involve neural structures that participate in the performance of such common tasks as vertical posture and locomotion (Gurfinkel et al 1998; Selionov et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Effects of muscle vibration on multi-finger interaction and coordination

et al. 2013

View full text Add to dashboard Cite

The purpose of this study was to investigate the effects of changes in the proprioceptive signals induced by muscle vibration on multi-finger interaction and coordination. We hypothesized that unintended force production by non-instructed fingers (enslaving) would increase with muscle vibration while synergy indices during steady-state force production would drop. The framework of the uncontrolled manifold hypothesis was used to quantify indices of multi-finger synergies stabilizing total force during steady-state force production and anticipatory changes in these indices (anticipatory synergy adjustments, ASAs) in preparation to a quick force pulse production with and without hand muscle vibration at 80 Hz. The dominant hands of twelve healthy right-handed subjects were tested under three conditions: no vibration, vibration of the palmar surface of the hand, and vibration of the forearm applied over the flexor muscles. There were no significant effects of vibration on maximal voluntary force. The magnitude of enslaving was larger during vibration of the hand compared to the other two conditions. During steady-state force production, strong synergies stabilizing total force were seen in all three conditions; however, indices of force-stabilizing synergies were lower during vibration of the hand. Prior to the force pulse initiation, the synergy index started to drop earlier and over a larger magnitude without vibration compared to either vibration condition. Effects of vibration on enslaving and synergy index may be due to diffuse reflex effects of the induced afferent activity on alpha-motoneuronal pools innervating the extrinsic flexor compartments. We conclude that multi-finger synergies are not based on signals from muscle receptors. The smaller synergy indices and ASAs may reflect supraspinal effects of the vibration-induced afferent activity, in particular its interactions with trans-thalamic loops.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of muscle vibration on multi-finger interaction and coordination

et al. 2013

View full text Add to dashboard Cite

show abstract

“…This results in an interpretation of proprioceptive information which does not match with the actual body position. Consequently, the body starts tilting in the direction of the vibrated muscles (Hayashi et al 1981) which is accompanied by the increased body sway (Eklund 1973; Gurfinkel and Kireeva 1995). Such a vibration has been shown to change spatial body orientation very fast (Roll et al 1989; Ceyte et al 2007; Thompson et al 2007) resulting in a postural response known as a ‘vibration-induced falling’ (Eklund 1973; Hayashi et al 1981).…”

Section: Introductionmentioning

confidence: 99%

Postural control in response to an external perturbation: effect of altered proprioceptive information

2011

View full text Add to dashboard Cite

The purpose of the study was to investigate the role of altered proprioception on anticipatory (APAs) and compensatory (CPAs) postural adjustments and their interaction. Nine healthy adults were exposed to external perturbations induced at the shoulder level while standing with intact or altered proprioception induced by bilateral Achilles tendon vibration. Visual information was altered (eyes open or closed) in both the conditions. Electrical activity of the eight trunk and leg muscles and center of pressure (COP) displacements were recorded and quantified within the time intervals typical for APAs and CPAs. The results showed that when proprioceptive information was altered in eyes open conditions, anticipatory muscle activity was delayed. Moreover, altered proprioceptive information resulted in smaller magnitudes of compensatory muscle activity as well as smaller COP displacements after the perturbation in both eyes open and eyes closed conditions. The outcome of the study provides information on the interaction between APAs and CPAs in the presence of altered proprioception.

show abstract

“…These results were similar to our results. However, some studies have reported that vibration stimuli increases postural disturbance and induces falling17 ) . On the other hand, there have been reports that stimulation of the afferent fiber of the muscle spindles results in maintenance of proper postural balance18 ) .…”

Section: Discussionmentioning

confidence: 99%

Effects of Local Muscle Vibration on the Displacement of Center of Pressure during Quiet Standing

Han

Lee

2013

J Phys Ther Sci

View full text Add to dashboard Cite

[Purpose] The purpose of this study was to investigate the effect of local vibration stimuli on body balance (trace area, trace length, and velocity) in healthy adults during double-leg standing. [Subjects and Methods] Thirty-nine subjects (10 male, 29 female) participated in this study. They were asked to keep their balance while holding four positions: standing with their eyes open, with and without vibration stimuli, and standing with their eyes closed, with and without vibration stimuli. The vibration stimuli, which had a duration of 30 sec, and a frequency of 60–80 Hz, were applied to the tibialis anterior and gastrocnemius muscle belly during double-leg standing. Balance measurement was performed using the Balance Trainer 4 (HUR Labs Oy, Tampere, Finland). All subjects provided informed consent prior to participation in this study. [Results] In the open-eyes position, there were no significant differences in trace area, trace length, and velocity of the center of pressure (COP) either with or without vibration stimuli. However, in the closed-eyes position, the vibration stimuli significantly decreased trace area, trace length, and velocity of the COP compared with when no vibration stimuli were applied. [Conclusion] These results suggest that vibration stimuli applied to the lower leg improve balance when a person’s eyes are closed during double-leg quiet standing.

show abstract

Postural readjustment to body sway induced by vibration in man

Cited by 49 publications

References 14 publications

Effects of muscle vibration on multi-finger interaction and coordination

Effects of muscle vibration on multi-finger interaction and coordination

Postural control in response to an external perturbation: effect of altered proprioceptive information

Effects of Local Muscle Vibration on the Displacement of Center of Pressure during Quiet Standing

Contact Info

Product

Resources

About