Do quiet standing centre of pressure measures within specific frequencies differ based on ability to recover balance in individuals with stroke?

Schinkel-Ivy, Alison; Singer, Jonathan C.; Inness, Elizabeth L.; Mansfield, Avril

doi:10.1016/j.clinph.2016.02.021

Cited by 26 publications

(16 citation statements)

References 50 publications

(79 reference statements)

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“…Previous studies have used energy band frequency analyses to determine sensorimotor strategies when in a quiet stance for patients with Down syndrome, anterior cruciate ligament reconstruction of knee, stroke, neuropathic conditions and dyslexia, as well as in the context of sports . However, to the best of our knowledge, this is the first report to confirm that joint deterioration in haemophilia patients is accompanied by different sensorial strategies for postural control, as compared to non‐haemophilia subjects.…”

Section: Discussionmentioning

confidence: 87%

Sensory strategies of postural sway during quiet stance in patients with haemophilic arthropathy

et al. 2017

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Section: Discussionmentioning

confidence: 87%

Sensory strategies of postural sway during quiet stance in patients with haemophilic arthropathy

et al. 2017

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“…In response to perturbations, rapid reactive responses represented by higher COP frequencies are important for successful balance recovery [ 17 ]. Poststroke individuals with balance recovery challenges in response to perturbations have been shown to have greater balance control challenges during quiet standing, specifically in higher frequency ranges (i.e., >0.4 Hz) [ 41 ]. Hence, increased frequencies in the high spasticity group in the present study may also suggest inefficient execution of “reactive” balance control strategies in poststroke individuals with high spasticity.…”

Section: Discussionmentioning

confidence: 99%

Impact of Spasticity on Balance Control during Quiet Standing in Persons after Stroke

Khiabani

Mochizuki

Ismail

et al. 2017

Stroke Research and Treatment

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Background Balance impairments, falls, and spasticity are common after stroke, but the effect of spasticity on balance control after stroke is not well understood. Methods In this cross-sectional study, twenty-seven participants with stroke were divided into two groups, based on ankle plantar flexor spasticity level. Fifteen individuals with high spasticity (Modified Ashworth Scale (MAS) score of ≥2) and 12 individuals with low spasticity (MAS score <2) completed quiet standing trials with eyes open and closed conditions. Balance control measures included centre of pressure (COP) root mean square (RMS), COP velocity, and COP mean power frequency (MPF) in anterior-posterior and mediolateral (ML) directions. Trunk sway was estimated using a wearable inertial measurement unit to measure trunk angle, trunk velocity, and trunk velocity frequency amplitude in pitch and roll directions. Results The high spasticity group demonstrated greater ML COP velocity, trunk roll velocity, trunk roll velocity frequency amplitude at 3.7 Hz, and trunk roll velocity frequency amplitude at 4.9 Hz, particularly in the eyes closed condition (spasticity by vision interaction). ML COP MPF was greater in the high spasticity group. Conclusion Individuals with high spasticity after stroke demonstrated greater impairment of balance control in the frontal plane, which was exacerbated when vision was removed.

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“…This further suggests that the cane moves with the swaying body and that stabilization can be obtained through the haptic reference rather than using the cane as a mechanical support (Misiaszek et al, 2016 ). Whether such effect can transfer to different conditions, such as postural disturbances (Owings et al, 2000 ), or to reactive balance control (Schinkel-Ivy et al, 2016 ), or to walking (Rabin et al, 2015 ) is an important issue, worth specific investigation.…”

Section: Discussionmentioning

confidence: 99%

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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Do quiet standing centre of pressure measures within specific frequencies differ based on ability to recover balance in individuals with stroke?

Abstract: These results provide insight into the mechanism by which reactive control of quiet standing is impaired in individuals with stroke, and may inform assessment and rehabilitation strategies for post-stroke reactive balance control.

Cited by 26 publications

References 50 publications

Sensory strategies of postural sway during quiet stance in patients with haemophilic arthropathy

Sensory strategies of postural sway during quiet stance in patients with haemophilic arthropathy

Impact of Spasticity on Balance Control during Quiet Standing in Persons after Stroke

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

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