Shiva Sherafat1, Mahyar Salavati2, Ismail Ebrahimi Takamjani3, Behnam Akhbari4, Shahrzad Mohammadi Rad5, Masood Mazaheri6, Hossein Negahben7, Pezhman Lali8. 1. PhD Student in Physical Therapy, Physiotherapy Department, Iran University of Medical Science, Tehran, Iran. 2. Professor, Physiotherapy Department, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Electronic address: mahyarsalavati@gmail.com. 3. Professor in Physical Therapy, Physiotherapy Department, Rehabilitation Faculty, Tehran University of Medical Sciences, Tehran, Iran. 4. Associate Professor, Physiotherapy Department, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. 5. PhD Student in Physical Therapy, Physiotherapy Department, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. 6. Assistant Professor, Musculoskeletal Research Center, Isfahan University of Medical Sciences, Isfahan, Iran. 7. Associate Professor, Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. 8. MSc in Energy Engineering, Amirkabir University of Technology, Tehran, Iran.
Abstract
OBJECTIVE: The purpose of this study was to compare the effect of dual tasking on postural and cognitive performance between participants with and without nonspecific chronic low back pain. METHODS: In this 3-factor mixed-design study, dynamic postural stability was assessed in 15 patients with chronic nonspecific low back pain and 15 age-, sex-, and size-matched asymptomatic participants. Bilateral stance on a Biodex Balance System was investigated at 3 levels of postural task difficulty (different platform stabilities levels with eyes open and closed) and 2 levels of cognitive task difficulty (with or without auditory Stroop test). We measured anterior-posterior, medial-lateral, and overall indices for postural performance. Average reaction time and error ratio of a modified auditory Stroop test were calculated as measures of the cognitive task performance. RESULTS: Mixed-design 3-way analyses of variance revealed significant interactions. Post hoc 2-way analyses of variance showed significant group by cognitive task difficulty for anterior-posterior (P < .001), medial-lateral (P = .003), and overall stability indices (P < .001) on a stiffness level of 5 with eyes closed. At this level, there were significant differences between single- and dual-task conditions for anterior-posterior (P < .001), medial-lateral (P = .02), and overall stability indices (P < .001) only in the chronic low back pain group. Also, at the most difficult postural conditions, participants with chronic low back pain increased their error ratio (P = .002), whereas matched asymptomatic individuals increased their reaction time (P < .01) of the auditory Stroop test. CONCLUSION: Postural task performance is attenuated by cognitive loading at a moderate level of postural task difficulty. Therefore, to observe the effect of attentional demands of postural control, task difficulty should be considered.
OBJECTIVE: The purpose of this study was to compare the effect of dual tasking on postural and cognitive performance between participants with and without nonspecific chronic low back pain. METHODS: In this 3-factor mixed-design study, dynamic postural stability was assessed in 15 patients with chronic nonspecific low back pain and 15 age-, sex-, and size-matched asymptomatic participants. Bilateral stance on a Biodex Balance System was investigated at 3 levels of postural task difficulty (different platform stabilities levels with eyes open and closed) and 2 levels of cognitive task difficulty (with or without auditory Stroop test). We measured anterior-posterior, medial-lateral, and overall indices for postural performance. Average reaction time and error ratio of a modified auditory Stroop test were calculated as measures of the cognitive task performance. RESULTS: Mixed-design 3-way analyses of variance revealed significant interactions. Post hoc 2-way analyses of variance showed significant group by cognitive task difficulty for anterior-posterior (P < .001), medial-lateral (P = .003), and overall stability indices (P < .001) on a stiffness level of 5 with eyes closed. At this level, there were significant differences between single- and dual-task conditions for anterior-posterior (P < .001), medial-lateral (P = .02), and overall stability indices (P < .001) only in the chronic low back pain group. Also, at the most difficult postural conditions, participants with chronic low back pain increased their error ratio (P = .002), whereas matched asymptomatic individuals increased their reaction time (P < .01) of the auditory Stroop test. CONCLUSION: Postural task performance is attenuated by cognitive loading at a moderate level of postural task difficulty. Therefore, to observe the effect of attentional demands of postural control, task difficulty should be considered.
Authors: Afsaneh Zeinalzadeh; Salman Nazary-Moghadam; Sayyed Hadi Sayyed Hoseinian; Mohammad H Ebrahimzadeh; Esmaeel Imani; Samira Karimpour Journal: Arch Bone Jt Surg Date: 2021-01
Authors: Matheus A Trindade; Aline Martins de Toledo; Jefferson Rosa Cardoso; Igor Eduardo Souza; Felipe Augusto Dos Santos Mendes; Luisiane A Santana; Rodrigo Luiz Carregaro Journal: Int J Sports Phys Ther Date: 2017-11