Anticipatory postural control during arm movements and floor translation

Fujiwara, Katsuo

doi:10.7600/jpfsm.2.155

Cited by 4 publications

(2 citation statements)

References 44 publications

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“…The central nervous system for postural control is divided into reflex- and situation-dependent adaptation [ 25 ]. The former is composed primarily of the brainstem, spinal cord and cerebellum and is closely involved in the control of static balance [ 26 , 27 ]. The latter also incorporates the diencephalon, basal ganglia and cerebral cortex and is involved in the control of dynamic balance.…”

Section: Discussionmentioning

confidence: 99%

Dominant side in single-leg stance stability during floor oscillations at various frequencies

Kiyota

Fujiwara

2014

J Physiol Anthropol

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BackgroundWe investigated lateral dominance in the postural stability of single-leg stance with anteroposterior floor oscillations at various frequencies.MethodsThirty adults maintained a single-leg stance on a force platform for 20 seconds per trial. Trials were performed with no oscillation (static condition) and with anteroposterior floor oscillations (2.5-cm amplitude) at six frequencies: 0.25, 0.5, 0.75, 1.0, 1.25 and 1.5 Hz (dynamic condition). A set of three trials was performed on each leg in each oscillation frequency in random order. The mean speed of the center of pressure in the anteroposterior direction (CoPap) was calculated as an index of postural stability, and frequency analysis of CoPap sway was performed. Footedness for carrying out mobilizing activities was assessed with a questionnaire.ResultsCoPap speed exponentially increased as oscillation frequency increased in both legs. The frequency analysis of CoPap showed a peak <0.3 Hz at no oscillation. The frequency components at 0.25-Hz oscillation included common components with no oscillation and those at 1.5-Hz oscillation showed the maximum amplitude among all conditions. Postural stability showed no significant difference between left- and right-leg stance at no oscillation and oscillations ≤1.25 Hz, but at 1.5-Hz oscillation was significantly higher in the right-leg stance than in the left-leg stance. For the lateral dominance of postural stability at individual levels, the lateral difference in postural stability at no oscillation was positively correlated with that at 0.25-Hz oscillation (r = 0.51) and negatively correlated with that at 1.5-Hz oscillation (r = -0.53). For 70% of subjects, the dominant side of postural stability was different at no oscillation and 1.5-Hz oscillation. In the subjects with left- or right-side dominance at no oscillation, 94% or 38% changed their dominant side at 1.5-Hz oscillation, with a significant difference between these percentages. In the 1.5-Hz oscillation, 73% of subjects had concordance between the dominant side of postural stability and that of mobilizing footedness.ConclusionIn static conditions, there was no lateral dominance of stability during single-leg stance. At 1.5-Hz oscillation, the highest frequency, right-side dominance of postural stability was recognized. Functional role in supporting leg may be divided between left and right legs according to the change of balance condition from static to dynamic.

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Section: Discussionmentioning

confidence: 99%

Dominant side in single-leg stance stability during floor oscillations at various frequencies

Kiyota

Fujiwara

2014

J Physiol Anthropol

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“…In this study, we investigated age-related changes from childhood to adolescence in the anticipatory activation of the postural muscles with arm movement during standing in a large-scale study and obtained standard values for age-related changes. In voluntary postural control during arm movements, the activation pattern of postural muscles is known to be affected by arm movement dynamics and behavioral conditions [ 41 ]. In the present study, arm movement time was not significantly correlated with any age group or postural muscle for the arm movement dynamics.…”

Section: Discussionmentioning

confidence: 99%

Age-related changes in the activation timing of postural muscles to the prime mover muscle for bilateral arm flexion during standing

Kiyota

Fujiwara

2022

J Physiol Anthropol

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Background We aimed to obtain the standard values of age-related changes in the activation timing of postural muscles to the prime mover muscle (anterior deltoid [AD]) for bilateral arm flexion during standing. Methods The study participants were 276 children (aged 3–14 years) and 32 adults (aged 20–26 years). In response to a visual stimulus, participants raised both arms from a fully extended position as quickly as possible, stopped their arms voluntarily at a horizontal level at the shoulder, and maintained that position for 2 s. Ten test trials were performed. By using surface electromyography, the duration from the burst onset of the postural muscles to that of AD was measured as the starting time of the postural muscles (rectus abdominis [RA], erector spinae [ES], rectus femoris [RF], biceps femoris [BF], tibialis anterior [TA], gastrocnemius medialis [GcM], and soleus [SOL]). The starting time was presented as a negative value when the burst onset of the postural muscles preceded that of AD, which was defined as the preceding activation. A positive value for the starting time was defined as delayed activation. Results In adults, the burst onsets of ES and BF significantly preceded that of AD. In ES, the starting time preceded the onset of AD in those aged ≥ 5–6 years; no difference with adults was found at age 13–14 years. On the other hand, in BF, significant delayed activation was found at ages 3–4 to 11–12 years. While the starting time decreased with age, no significant preceding activation similar to adults was found, even at age 13–14 years. In TA, no significant difference with the onset of AD was found at age 3–6 years, and significant delayed activation was found at age ≥ 7–8 years. Significant delayed activation in GcM, SOL, RA, and RF was observed in all age groups, and no age-related changes were observed in children. Conclusion These findings could provide standard values from childhood to adolescence for age-related changes in anticipatory postural muscle activity during voluntary movement while standing and contribute to applications in the fields of sports and rehabilitation.

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Preparatory postural adjustments during gait initiation in healthy younger and older adults: Neurophysiological and biomechanical aspects

et al. 2015

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Anticipatory postural control during arm movements and floor translation

Cited by 4 publications

References 44 publications

Dominant side in single-leg stance stability during floor oscillations at various frequencies

Dominant side in single-leg stance stability during floor oscillations at various frequencies

Age-related changes in the activation timing of postural muscles to the prime mover muscle for bilateral arm flexion during standing

Preparatory postural adjustments during gait initiation in healthy younger and older adults: Neurophysiological and biomechanical aspects

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