Comparison Between Movement-Based and Task-Based Mirror Therapies on Improving Upper Limb Functions in Patients With Stroke: A Pilot Randomized Controlled Trial

Zhongfei Bai, Jiaqi Zhang, Ziwei Zhang, Tian Shu, Wenxin Niu, Zhongfei Bai, Jiaqi Zhang, Ziwei Zhang, Tian Shu, Wenxin Niu

Abstract

Objective: The aim of this trial was to compare the effect of movement-based mirror therapy (MMT) and task-based mirror therapy (TMT) on improving upper limb functions in patients with stroke. Methods: A total of 34 patients with sub-acute stroke with mildly to moderately impaired upper limb motor functions. The participants were randomly allocated to one of three groups: MMT, TMT, and conventional treatment (CT). The MMT group underwent movement-based mirror therapy for around 30 min/day, 5 days/week, for 4 weeks, whereas the TMT group underwent dose-matched TMT. The CT group underwent only conventional rehabilitation. The MMT and TMT groups underwent CT in addition to their mirror therapy. Blinded assessments were administered at baseline and immediately after the intervention. Upper limb motor functions, measured using Fugl-Meyer Assessment-upper extremity (FMA-UE), Wolf Motor Function Test (WMFT), and hand grip strength; upper limb spasticity, measured using the modified Ashworth scale (MAS); and activities of daily living, measured using the modified Barthel index (MBI). Results: A significant time-by-group interaction effect was noted in FMA-UE. Post-hoc analysis of change scores showed that MMT yielded a better effect on improving FMA-UE than the other two therapies, at a marginally significant level (P = 0.050 and 0.022, respectively). No significant interaction effect was noted in WMFT, hand grip strength, MAS, and MBI. Conclusion: Both MMT and TMT are effective in improving the upper limb function of patients with mild to moderate hemiplegia due to stroke. Nevertheless, MMT seems to be superior to TMT in improving hemiplegic upper extremity impairment. Further studies with larger stroke cohorts are expected to be inspired by this pilot trial. Trial registration number: No. ChiCTR1800019043 (http://www.chictr.org.cn/index.aspx).

Keywords: mirror therapy; rehabilitation; stroke; task-oriented training; upper limb.

Figures

Figure 1
Figure 1
Flowchart of the study. MMT, movement-based mirror therapy; TMT, task-based mirror therapy; CT, conventional treatment.
Figure 2
Figure 2
The comparisons in all outcome measures across the three groups. MMT, movement-based mirror therapy; TMT, task-based mirror therapy; CT, conventional treatment; FMA-UE, Fugl-Meyer Assessment-upper extremity; WMFT, wolf motor function test; MBI, modified Barthel index; MAS, modified Ashworth Scale.
Figure 3
Figure 3
An example of the process of “fault and correction.” The given task is that participants are required to transfer an object placed in the No. 3 hole (in orange color) to the No. 2 hole (Step 1). However, participants usually move the object to the No. 4 hole when they are viewing the mirror reflection (Step 2). Then, participants realize the fault and transfer the object it to the No. 2 hole (Steps 3, 4).

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