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Asymmetry of Anticipatory Postural Adjustment During Gait Initiation

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Hiraoka K., Hatanaka R., Nikaido Y., Jono Y., Nomura Y., Tani K., Chujo Y.
Journal of Human Kinetics
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2014
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vol. 42
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issue 1
7-14
EN
The purpose of this study was to investigate the asymmetry of anticipatory postural adjustment (APA) during gait initiation and to determine whether the process of choosing the initial swing leg affects APA during gait initiation. The participants initiated gait with the leg indicated by a start tone or initiated gait with the leg spontaneously chosen. The dependent variables of APA were not significantly different among the condition of initiating gait with the preferred leg indicated by the start tone, the condition of initiating gait with the non-preferred leg indicated by the start tone, and the condition of initiating gait with the leg spontaneously chosen. These findings fail to support the view that the process of choosing the initial swing leg affects APA during gait initiation. The lateral displacement of the center of pressure in the period in which shifting the center of pressure to the initial swing phase before initiating gait with the left leg indicated by the external cue was significantly larger than that when initiating gait with the right leg indicated by the external cue, and significantly larger than that when initiating gait with the leg spontaneously chosen. Weight shift to the initial swing side during APA during gait initiation was found to be asymmetrical when choosing the leg in response to an external cue
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Test-Retest Reliability of Measurements of the Center of Pressure Displacement in Quiet Standing and During Maximal Voluntary Body Leaning Among Healthy Elderly Men

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Rafał S., Janusz M., Wiesław O., Robert S.
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EN
The aim of the study was to evaluate intra- and intersession test-retest reliability for the measurements of centre of pressure displacement in quiet standing and during maximal voluntary body leaning (approximate area of stability limits).27 elderly men participated in the study (71.4±4.9 of age). Intrasession (4 measurements with two-minute breaks) and intersession (4 measurements one week apart) reliability were examined. Parameters connected to the centre of pressure data (AMTI force platform) were measured during a quiet stance and voluntary body leaning in medio-lateral and anterior-posterior directions (approximate limits of stability). Intraclass correlation coefficients (ICC2,1 and ICC2, k) were calculated.In case of quiet standing, only mean velocity of centre of pressure sway provides high reliability in intrasession - ICC2,1 of .84 and ICC2, k of .96, and in intersession - ICC2,1 of .76. Evaluation of limits of stability showed high values of all parameters (maximal and minimal displacement in sagittal and frontal planes, distance between maximal and minimal position of centre of pressure in sagittal and frontal planes and approximated area of stability limits) in intrasession - ICC2,1 between .82 to .96 and ICC2, k between .95 to .99. Similar tendency was observed in the intersession retest.Average velocity of the centre of pressure is the only parameter that showed a high application value in case of measurements during quiet standing. Parameters related to the stability limits appeared very reliable what proves that this evaluation may have potential application in the clinical practice.
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Ocena równowagi kobiet po 60 roku życia/ Assessment of Balance women over 60 years of age

75%
Wyszyńska J., Drzał-Grabiec J., Podgórska-Bednarz J., Pop T., Snela S.
Advances in Rehabilitation
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2015
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vol. 29
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issue 1
31-37
EN
Introduction: Correct balance is necessary ability to proper performance of activities of daily living. Age-related weakening of the sensory and motor reactions, can cause postural instability and increase risk of falls. Aim of this study is to determine the differences in the values of the parameters describing the postural stability of women over 60 years of age. Material and methods: 180 women participated in the study: 98 women between the age of 60 and 92 (x=71 years old) and 82 women between the age of 21 and 26 (x=21 years old). Standing balance was assessed in the trial with eyes open and closed, by using stabilometric platform. Six different motion parameters of center of pressure (COP) were evaluated. Results: Statistical analysis showed significant differences in most parameters of the balance of women over 60 years of age and women in the control group. Conclusions: 1) With age, there are significant changes in the in the balancing process, causing growing deficit of postural stability. 2) Women over age 60 have a worse postural stability than younger women within each analyzed parameter with the exception of swings in the frontal plane.
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