Javad Parhizkar Kohneh Ovqaz; Ahmad Ghotbi Varzaneh; Amir Hossein Ghorbani
Abstract
Postural control requires the integration of sensory information in the visual,vestibular, and senses the body systems. Also research has shown that the sensorysystems involved in postural control, decreased with increasing age. The aim ofthis study was to investigate the effects of age and manipulation ...
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Postural control requires the integration of sensory information in the visual,vestibular, and senses the body systems. Also research has shown that the sensorysystems involved in postural control, decreased with increasing age. The aim ofthis study was to investigate the effects of age and manipulation of sensoryinformation on the postural control. For this purpose, displacement of the anterior- posterior, middle – lateral and speed center of pressure (COP) 22 elderly (59/54± 2/31 year) and 25 young men (23/12±3/26 year) that selected based on targetand availability from Shahid Chamran University students and staff in fourdifferent sensory conditions including 1) open eyes an hard surface 2) eyes openon soft surface3) eyes closed on hard surface 4) eyes closed on soft surface duringthree 30-second efforts with 5 min rest intervals between efforts evaluated. Afterinvestigating the data normality with kolmogorov smirnov and equality of varianceusing the leven test, data using multivariable variance analysis and one-wayvariance analysis was analyzed. Significant differences was observed betweenyoung and elderly groups in all conditions, also removes the visual and plantarproprioceptive information lead to increased sway in the two groups that increasewas greater in the elderly than in young group. This results indicate theimportance of visual information and plantar proprioceptive in postural control,especially in the elderly.
Javad Parhizkar Kohneh Oghaz; Mehdi Zarghami; Ahmad Ghotbi Varzaneh; Amirhosein Ghorbani
Abstract
Postural control has an important role in daily activities and motor independence. In recent years, conscious aspects of postural control such as attention and cognitive processes have received attention for balance optimization performance. Therefore, the present study designed to examine the age–related ...
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Postural control has an important role in daily activities and motor independence. In recent years, conscious aspects of postural control such as attention and cognitive processes have received attention for balance optimization performance. Therefore, the present study designed to examine the age–related differences in postural control in the internal and external focus of attention. For this purpose, displacement of the anterior–posterior, middle–lateral and speed of center of pressure (cop), 22 elderly subjects (mean+SD=59.95±2.12 year) and 22 young men (mean+SD=24.16±2.76 year) who were selected from Shahid Chamran University students and staff purposefully and by availability were measured in three 30–second trials in the internal focus and three 30-second trials in external focus using force platform. After the normality of data had been tested with Kolmogorov-Smirnov test and the equality of variance had been tested using the Levene test, data were analyzed using multivariable variance analysis, one–way variance analysis and MANOVA. Results showed that postural stability of both groups in external focus was more than internal focus. These results supported limited action hypotheses and conscious processes. Also, in both conditions, young group had more postural stability than the elderly. It seems that the weaker performance of the elderly in both external and internal conditions was due to the effects of aging on sensorimotor systems.
