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Rehabilitation Research and Practice
Volume 2018, Article ID 1530245, 13 pages
Research Article

Left Right Judgement Task and Sensory, Motor, and Cognitive Assessment in Participants with Wrist/Hand Pain

1Sciences de la Réadaptation, École de Réadaptation, Faculté de Médecine, Université de Montréal, Montréal (Québec), Canada H3C 3J7
2École de Réadaptation, Faculté de Médecine, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal (Québec), Canada H3C 3J7
3Researcher, Centre for Interdisciplinary Research in Rehabilitation of Greater Montreal (CRIR), Canada
4Professeur Agrégé Université de Montréal, Chef du Service de Chirurgie Plastique du Centre Hospitalier Université de Montréal (CHUM), 850 rue St-Denis Pav. S-Local S02-128 Montréal (Québec), Canada H2X 0A9
5Service de Chirurgie Plastique, Département de Chirurgie du Centre Hospitalier de l'Université de Montréal (CHUM), 1000 rue Saint-Denis (Québec), Canada H2X 0C1

Correspondence should be addressed to René Pelletier; ac.laertnomu@reitellep.ener

Received 1 June 2018; Revised 20 July 2018; Accepted 2 August 2018; Published 26 August 2018

Academic Editor: Velio Macellari

Copyright © 2018 René Pelletier et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The Left Right Judgement Task (LRJT) involves determining if an image of the body part is of the left or right side. The LRJT has been utilized as part of rehabilitation treatment programs for persons with pain associated with musculoskeletal injuries and conditions. Although studies often attribute changes and improvement in LRJT performance to an altered body schema, imaging studies suggest that the LRJT implicates other cortical regions. We hypothesized that cognitive factors would be related to LRJT performance of hands and feet and that sensory, motor, and pain related factors would be related to LRJT in the affected hand of participants with wrist/hand pain. In an observational cross-sectional study, sixty-one participants with wrist/hand pain participated in a study assessing motor imagery ability, cognitive (Stroop test), sensory (Two-Point Orientation Discrimination, pressure pain thresholds), motor (grip strength, Purdue Pegboard Test), and pain related measures (West Haven Yale Multidimensional Pain Inventory) as well as disability (Disability of the Arm, Shoulder and Hand). Multiple linear regression found Stroop test time and motor imagery ability to be related to LRJT performance. Tactile acuity, motor performance, participation in general activities, and the taking of pain medications were predictors of LRJT accuracy in the affected hand. Participants who took pain medications performed poorly in both LRJT accuracy (p=0.001) and reaction time of the affected hand (p=0.009). These participants had poorer cognitive (p=0.013) and motor function (p=0.002), and higher pain severity scores (p=0.010). The results suggest that the LRJT is a complex mental task that involves cognitive, sensory, motor, and behavioural processes. Differences between persons with and without pain and improvement in LRJT performance may be attributed to any of these factors and should be considered in rehabilitation research and practice utilizing this task.