The Effect of Limb Dominance on Reaction Time and Anticipatory Postural Adjustments During Gait Initiation in Healthy Subjects

Parisa Kazemi; Fateme Esfandiarpour; Saeed Talebian; Gholam Reza Olyaei; Reza Salehi; Seyedeh Maryam Hejazi

E-ISSN : 2148-9696

Crescent Journal of
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Jul 2020, Vol 7, Issue 3

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Brief Report
The Effect of Limb Dominance on Reaction Time and Anticipatory Postural Adjustments During Gait Initiation in Healthy Subjects
Parisa Kazemi¹, Fateme Esfandiarpour^1,2, 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 Viewed : 2788 times Downloaded : 1990 times. Keywords : Limb, Dominance, Reaction time, Postural balance, Gait initiation
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Abstract

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.