Using visual stimuli to enhance gait control

Rhea, Christopher K.; Kuznetsov, Nikita А.

doi:10.3233/ves-170602

Cited by 9 publications

(8 citation statements)

References 90 publications

(96 reference statements)

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“…On the contrary, living systems are rarely in states of equilibrium, and "most healthy behaviors are highly irregular and pseudo-random" (Varela et al, 2010, p. 585). Thus, while pathology was once understood as chaos and disorder within a physiological system, in many ways it is now viewed as a decrease in the patterns of self-similarity in aging or diseased systems (Delignières & Marmelat, 2012;Rhea & Kuznetsov, 2017).…”

Section: Fractal Patterns In Human Physiologymentioning

confidence: 99%

On the fractal nature of complex syntax and the timescale problem

Evans

2020

10.14746/ssllt

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Fundamental to complex dynamic systems theory is the assumption that the recursive behavior of complex systems results in the generation of physical forms and dynamic processes that are self-similar and scale-invariant. Such fractal-like structures and the organismic benefit that they engender has been widely noted in physiology, biology, and medicine, yet discussions of the fractal-like nature of language have remained at the level of metaphor in applied linguistics. Motivated by the lack of empirical evidence supporting this assumption, the present study examines the extent to which the use and development of complex syntax in a learner of English as a second language demonstrate the characteristics of self-similarity and scale invariance at nested timescales. Findings suggest that the use and development of syntactic complexity are governed by fractal scaling as the dynamic relationship among the subconstructs of syntax maintain their complexity and variability across multiple temporal scales. Overall, fractal analysis appears to be a fruitful analytic tool when attempting to discern the dynamic relationships among the multiple component parts of complex systems as they interact over time.

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Section: Fractal Patterns In Human Physiologymentioning

confidence: 99%

On the fractal nature of complex syntax and the timescale problem

Evans

2020

10.14746/ssllt

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“…Many different forms of information affect walking style. The human body is able to walk when various factors, such as the musculoskeletal and nervous systems, work together in harmony via integrated information processing [ 1 ]. Balance is essential for walking, and vision, vestibular sense, proprioception, and muscle strength are important for maintaining balance [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, while the degradation of visual processes or vestibular function is difficult to recover, muscle strength or function can be increased through exercise. In maintaining posture during ambulation, if one function deteriorates, others compensate to attempt correction of the defect [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Movement Time of Lower Trunk Muscles during Dynamic Postural Control in Response to a Sudden Visual Stimulus during Walking: A Pilot Study

Jung

Kim

Choi

et al. 2021

IJERPH

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Postural control during walking is maintained by the combination of various factors. Among these factors, adjustment of trunk movement is essential for maintaining postural control, and the response of muscles to unpredictable stimuli affects postural control. Loss of balance while walking increases the risk of accidents, the frequency of which depends on age and sex. In this study, we investigated whether there was a difference in the movement time of trunk muscles to sudden stimulation while walking according to age and sex. Fourteen healthy individuals aged 20–30 years (6 men, 8 women) and 12 individuals aged 50–70 years (4 men, 8 women) were included in the study. Movement time of bilateral erector spinae and rectus abdominis muscles in response to visual stimulation during walking was examined using surface electromyography. Movement time was calculated as the total muscle activation time excluding the reaction time. This study revealed no significant differences in movement time of the erector spinae muscles according to sex or age. The role of the rectus abdominis muscles in maintaining posture during walking was insignificant. In conclusion, the movement time of trunk muscles in response to sudden visual stimulation during walking did not differ by age or sex, and the difference in accident frequency may be associated with deterioration of other factors required to maintain posture.

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“…Many studies have investigated the strategies adopted to counterbalance the increased (static and dynamic) instability, in physiological or pathological conditions. Among these, several works focused on the effects of sensory stimulation on balance and locomotion [20][21][22][23] . Sensory afferents provide information on the reciprocal position and movement of body segments and their orientation in space 20 .…”

Section: Introductionmentioning

confidence: 99%

The effects of different frequencies of rhythmic acoustic stimulation on gait kinematics and trunk sway in healthy elderly population

Minino

Sorrentino

et al. 2020

Preprint

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The use of rhythmic acoustic stimulation (RAS) in improving gait and balance in healthy elderly subjects has been widely investigated. However, methodologies and results are often controversial. In this study, we hypothesize that both the kinematic features of gait and stability, depend on the frequency at which RAS is administered. Our aim was to observe, through 3D Gait Analysis, the effect of different types of RAS (at a fixed frequency or based on the average cadence of each subject) on both gait spatio-temporal parameters and stability. The latter was estimated through an innovative measure, the trunk displacement index (TDI) that we have recently implemented. We observed that the low frequencies RAS led to a general slowdown of gait, which did not provide any clear benefit and produced harmful effects on stability when the frequency became too low compared to the individual natural frequency. On the contrary, the high frequencies of RAS showed a slight acceleration of gait, accompanied by better stability (as documented by a lower TDI value), regardless of the type of RAS. Finally, the RAS equal to the individual natural cadence also produced an increase in stability.

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Using visual stimuli to enhance gait control

Cited by 9 publications

References 90 publications

On the fractal nature of complex syntax and the timescale problem

On the fractal nature of complex syntax and the timescale problem

Movement Time of Lower Trunk Muscles during Dynamic Postural Control in Response to a Sudden Visual Stimulus during Walking: A Pilot Study

The effects of different frequencies of rhythmic acoustic stimulation on gait kinematics and trunk sway in healthy elderly population

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