چکیده:
Objectives: The dominant leg has always received special attention in public health practices and
even in professional clinical evaluation and interventions. The aim of this research study was to
methodically examine the substrate balance character of the non-dominant leg under dual task
conditions and visual deprivation to increase the baseline insight for maintaining body balance and
for fall prevention in aging adults.
Methods: Twenty healthy senior citizens with non-dominant left leg were conscripted into a crosssectional
study, the aim of which was to examine one-legged standing balance strategy on a force
plate at Motor Control Laboratory in University of Social Welfare and Rehabilitation Sciences,
Tehran, Iran. Four balance conditions with varied levels of difficulty, including: (a) single left leg
standing with open eyes; (b) single left leg standing with open eyes performing Stroop dual task;
(c) single left leg standing with eyes shut; and (d) single left leg standing with eyes shut under dual
task condition. These conditions were applied to assess balance function of the non-dominant leg
of the subjects.
Results: Repeated measurement tests revealed that among the six variables, namely Area, Mean
Velocity, Range Fore After, Range Side Way, Entropy X, and Entropy Y, that are measured by force
plate, only Entropy X did not have a significant difference between conditions (P<0.05).
Discussion: Standing on non-dominant leg is a challenging task that requires a well-balanced
system to survive the primary decreased somatosensory input. Therefore, the examinee had to have
the requisite capabilities to cope with the changes caused when extra manipulation was included.
During the course of the study, the most challenging situation was encountered when the subjects
were standing on their non-dominant leg with eyes shut, which should be exactingly checked not to
create a risky point as an Achilles’ heel of balance system. It was observed that the non-dominant
leg was more susceptible to be affected when an aging adult did not have access to the visual input
or during performing dual tasks with eyes shut. It is thus recommended that such conditions should
be included in balance assessment tests or interventions.
خلاصه ماشینی:
Research Paper: Investigating the Impact of Dual Task Condition and Visual Manipulation on Healthy Young Old During Non-Dominant Leg Stance Bahareh Zeynalzadeh Ghoochani1, Seyed Alireza Derakhshanrad1,2*, Seyed Ali Hosseini3, Saeed Talebian4, Akbar Biglarian5, Afsaneh Zeinal- zadeh6, Salman Nazary Moghadam6 1.
The aim of this research study was to methodically examine the substrate balance character of the non-dominant leg under dual task conditions and visual deprivation to increase the baseline insight for maintaining body balance and for fall prevention in aging adults.
Methods: Twenty healthy senior citizens with non-dominant left leg were conscripted into a cross- sectional study, the aim of which was to examine one-legged standing balance strategy on a force plate at Motor Control Laboratory in University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
It was observed that the non-dominant leg was more susceptible to be affected when an aging adult did not have access to the visual input or during performing dual tasks with eyes shut.
2. Methods Participants A sample of twenty active young old with non-domi- nant left leg from Tehran was conscripted into a cross- sectional study, which was aimed to examine one-legged standing balance pattern on a force plate at Motor Con- trol Laboratory in University of Social Welfare and Re- habilitation Sciences, Tehran, Iran.
In the light of the above-mentioned points, this study aimed to explore balance strategy of healthy elderly individuals under cognitive dual task which is complemented with altered visual input dur- ing the decreased somatosensory input of standing on the non-dominant leg.