Assessment of dynamic balance during step initiation in Parkinson’s disease patients and elderly – a validity study

Juras, Grzegorz; Kamieniarz, Anna; Michalska, Justyna; Słomka, Kajetan J.

doi:10.37190/abb-01494-2019-02

Cited by 12 publications

(21 citation statements)

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“…The transit phase (2 nd Phase) started at the moment when a momentary COP displacement exceeded the mean COP displacement plus three SDs (preparatory time -S1) (the mean and SD were calculated based on measurements made within the rst 5 s of the 1 st Phase). The step was over (stability regained time -S2) when the momentary COP displacement was lower than the mean value plus three SDs based on the last 5 s of the trial (3 rd phase) (see Juras et al [16]). DST (s) -double-support time, when each foot is in contact with one of the platforms.…”

Section: Methodsmentioning

confidence: 99%

Age-related changes in postural control in older women: transitional tasks in step initiation

Michalska

Kamieniarz

Sobota

et al. 2020

Preprint

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Background: Aging, being a natural process, involves many functional and structural changes within the body. Identifying the age-related postural changes will provide insight into the role of aging on postural control during locomotion. The aim of this study was to identify age-related postural changes during a transitional task under different conditions.Methods: Sixty healthy females divided into three age groups: A (50-60 y/o), B (60-70 y/o), and C (70-80 y/o). The transitional task was measured by two force platforms. The procedure consisted of three phases: quiet standing, transfer onto a second platform, and quiet standing on the second platform. Four different conditions were applied: unperturbed transfer, obstacle crossing, step-up, and step-down. Double-support time, transit time, and stability time before and after the step task were analyzed.Results: The transit time was longer by 30% for subjects over 70 y/o. The double-support time was longer by 11% among adults 60-70 y/o, while in people over 70 y/o it was longer by almost 50% compared to the 50-60 y/o subjects. The stability time before the transitional task was longer by 17% among adults over 60 y/o compared to middle-age subjects. The stability times before and after the transitional task were longer for adults in the 50-60 y/o category. Conclusion: The proposed procedure is adequate for assessing age-related changes in postural control while undergoing a transitional task. An analysis of the double-support time and stability time before and after the step task enabled the detection of early signs of balance changes in middle-age adults. Independent of age, the transitional task parameters changed with the increasing difficulty of the tasks.

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Section: Methodsmentioning

confidence: 99%

Age-related changes in postural control in older women: transitional tasks in step initiation

Michalska

Kamieniarz

Sobota

et al. 2020

Preprint

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“…Figure 2. Four conditions of the transitional task [9] The trials were repeated 3 times and lasted 35 s each. Before being examined, the subjects practiced the transitional task on the force platforms.…”

Section: Methodsmentioning

confidence: 99%

“…The recording of center of foot pressure (COP) displacements was divided into three phases (see Juras et al. [9]): 1 st Phase -quiet standing before the transitional phase, 2 nd Phase -transit phase, and 3 rd phase -quiet standing until measurement completion. The following variables were analyzed: TT (s) -transit time, the duration of the transit phase; S1 (s) -stability time 1 (preparatory stability time), the time from exiting quiet standing to the time when the leading foot was resting on the second platform; S2 (s)stability time 2 (regained stability time), the time from raising the foot from the rst platform to the end of the 2 nd Phase; DST (s) -double-support time, when each foot is in contact with one of the platforms.…”

Section: Methodsmentioning

confidence: 99%

“…-transit time; S1 -stability time 1; S2 -stability time 2; DST -double support time; group A -50-60 years old; group B -60-70 years old, group C -70-80 years old, '+' -signi cant differences between groups (p < 0.05); '-' -no signi cant differences between groups (p > 0.05) Experimental set-up -three phases[9] Median value of transit time, stability time 1, stability time 2, double-support time (minimum, maximum marked as error bars) in the four conditions (2nd phase) among groups A, B, and C. The horizontal bars indicate statistically signi cant differences within the groups (Friedman ANOVA repeated measures with the post hoc test). Abbreviations: at -unperturbed crossing; obstacle -perturbed crossing…”

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confidence: 99%

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Age-Related Changes in Postural Control: transitional task

Michalska

Kamieniarz

Sobota

et al. 2020

Preprint

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Background Aging, being a natural process, involves many functional and structural changes within the body. Identifying the onset of age-related postural changes will provide insight into the role of aging on postural control during locomotion. The aim of this study was to identify age-related postural changes during a transitional task under different conditions. Methods Sixty healthy females divided into three age groups: A (50–60 y/o), B (60–70 y/o), and C (70–80 y/o). The transitional task was measured by two force platforms. The procedure consisted of three phases: quiet standing, transfer onto a second platform, and quiet standing on the second platform. Four different conditions were applied: unperturbed transfer, obstacle crossing, step-up, and step-down. Double-support time, transit time, and stability time before and after the step task were analyzed. Results The transit time was longer by 30% for subjects over 70 y/o. The double-support time was longer by 11% among adults 60–70 y/o, while in people over 70 y/o it was longer by almost 50% compared to the 50–60 y/o subjects. The stability time before the transitional task was longer by 17% among adults over 60 y/o compared to middle-age subjects. The stability times before and after the transitional task were longer for adults in the 50–60 y/o category. Conclusion The proposed procedure is adequate for assessing age-related changes in postural control while undergoing a transitional task. An analysis of the double-support time and stability time before and after the step task enabled the detection of early signs of balance changes in middle-age adults. Independent of age, the transitional task parameters changed with the increasing difficulty of the tasks.

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“…The obstacle height and positioning height of platforms A and B were established based on the standard height of a curb (6-16 cm) and a step (15-17 cm) according to Polish building regulations. Each trial lasted 35 s and was repeated three times, which was enough to achieve excellent reliability in all examined measures (ICC = 0.83-0.96) (41). The trial order was randomized.…”

Section: Transitional Task Proceduresmentioning

confidence: 99%

Transitional Locomotor Tasks in People With Mild to Moderate Parkinson's Disease

Kamieniarz¹,

Michalska²,

Marszałek³

et al. 2020

Front. Neurol.

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Background: People with Parkinson's disease (PD) exhibit deficits in maintaining balance both during quiet standing and during walking, turning, standing up from sitting, and step initiation. Objective: The purpose of this study was to examine balance disorders during a transitional task under different conditions in participants with PD. Methods: The research was conducted on 15 PD-II (mild) and 15 PD-III (moderate) individuals (H&Y II-III stage) and 30 healthy elderly. The transitional task was measured on two force platforms (A and B). The procedure consisted of three phases: (1) quiet standing on platform A, (2) crossing to platform B, and (3) quiet standing on platform B, each until measurements were completed. There were four conditions: crossing without an obstacle, crossing with an obstacle, and walking up and down the step. Results: There were no significant differences between mild PD individuals and healthy elderly during quiet standing before the transitional task and after completing the task. The temporal aspects describing the different transitional tasks were comparable between mild PD and healthy subjects. Moderate PD participants presented a significantly higher COP velocity after the transitional task compared to the healthy older adults (p < 0.05). Additionally, the moderate PD group showed significantly higher values for transit time relative to healthy subjects during the transitional task in all conditions (p < 0.05). Conclusions: Disease severity affects the temporal aspects of different transitional tasks in people with PD. The procedure of completing a transitional task under different conditions allowed differences between moderate and mild PD stages and healthy subjects to be observed.

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Assessment of dynamic balance during step initiation in Parkinson’s disease patients and elderly – a validity study

Cited by 12 publications

References 0 publications

Age-related changes in postural control in older women: transitional tasks in step initiation

Age-related changes in postural control in older women: transitional tasks in step initiation

Age-Related Changes in Postural Control: transitional task

Transitional Locomotor Tasks in People With Mild to Moderate Parkinson's Disease

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