Department of Occupational Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Rehabilitation Research Center, Department of Occupational Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Sci Rep. 2020 Sep 15;10(1):15085. doi: 10.1038/s41598-020-71845-7.
This study was designed to investigate the effects of anxiety and dual-task on reach and grasp motor control in chronic stroke survivors compared with age- and sex-matched healthy subjects (HC). Reach and grasp kinematic data of 68 participants (high-anxiety stroke (HA-stroke), n = 17; low-anxiety stroke (LA-stroke), n = 17; low-anxiety HC, n = 17; and high-anxiety HC, n = 17) were recorded under single- and dual-task conditions. Inefficient reach and grasp of stroke participants, especially HA-stroke were found compared with the control groups under single- and dual-task conditions as evidenced by longer movement time (MT), lower and earlier peak velocity (PV) as well as delayed and smaller hand opening. The effects of dual-task on reach and grasp kinematic measures were similar between HCs and stroke participants (i.e., increased MT, decreased PV that occurred earlier, and delayed and decreased hand opening), with greater effect in stroke groups than HCs, and in HA-stroke group than LA-stroke group. The results indicate that performing a well-learned upper limb movement with concurrent cognitive task leads to decreased efficiency of motor control in chronic stroke survivors compared with HCs. HA-stroke participants were more adversely affected by challenging dual-task conditions, underlying importance of assessing anxiety and designing effective interventions for it in chronic stroke survivors.
本研究旨在比较慢性卒中幸存者与年龄和性别匹配的健康对照者（HC），探讨焦虑和双重任务对伸手和抓握运动控制的影响。68 名参与者（高焦虑卒中（HA-卒中）组，n=17；低焦虑卒中（LA-卒中）组，n=17；低焦虑 HC 组，n=17；高焦虑 HC 组，n=17）在单任务和双任务条件下记录了伸手和抓握运动的运动学数据。与对照组相比，卒中参与者在单任务和双任务条件下表现出效率低下的伸手和抓握，表现为运动时间（MT）更长、峰值速度（PV）更低且更早、手张开延迟且更小。双任务对伸手和抓握运动学测量的影响在 HC 和卒中参与者之间相似（即 MT 增加、PV 更早下降、手张开延迟且减小），在卒中组比 HC 组的影响更大，在 HA-卒中组比 LA-卒中组的影响更大。结果表明，与 HC 相比，慢性卒中幸存者在进行已熟练掌握的上肢运动的同时进行认知任务，会导致运动控制效率降低。高焦虑卒中参与者在面临双重任务挑战时受到的影响更大，这凸显了在慢性卒中幸存者中评估焦虑和设计有效干预措施的重要性。
