|The Effect of Limb Dominance on Reaction Time and Anticipatory Postural Adjustments During Gait Initiation in Healthy Subjects|
|Parisa Kazemi1, Fateme Esfandiarpour1,2, Saeed Talebian3, Gholam Reza Olyaei3, Reza Salehi4, Seyedeh Maryam Hejazi3|
|1Musculoskeletal Rehabilitation Research Center, School of Rehabilitation Sciences, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
2Department of Family Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
3Physical Therapy Department, School of Rehbilitation, Tehran University of Medical Sciences, Tehran, Iran.
4Rehabilitation Research Center, Department of Rehabilitation Management, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
CJMB 2020; 7: 434-438
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Keywords : Limb, Dominance, Reaction time, Postural balance, Gait initiation
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Objectives: The stability and mobility function of dominant and non-dominant limbs are different. Considering the lack of any previous investigation in this regard, this study aimed to investigate the effect of limb dominancy on anticipatory postural adjustments and reaction time (RT) during gait initiation in healthy people.
Materials and Methods: Twenty healthy people with the right limb dominant participated in the study. The two stimuli of warning and response were used within a 2-second interstimulus interval. In addition, the participants were instructed to get ready to initiate walking as soon as they hear the warning stimulus and initiate gait immediately after hearing the response stimulus, followed by measuring the RT and duration of the anticipatory postural adjustment phase.
Results: The RT was slower when a person initiated gait with the dominant limb as compared with the non-dominant limb and no significant differences were observed in anticipatory postural adjustment phase duration between the two limbs.
Conclusions: In general, our findings demonstrated that information processing capacity for perception, motor planning, and selection of proper motor responses for movement initiation is affected by limb dominance.
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