Abstract P218: Effects of Bilateral Transcutaneous Electrical Nerve Stimulation Combined With Task-Oriented Training on the Recovery of Upper Limb Motor Impairment in People With Chronic Stroke

Abstract

Background: Transcutaneous electrical nerve stimulation(TENS) is an effective physiological intervention for people with stroke which aims at reducing muscle spasticity, enhancing muscle strength, and improving motor control and function. In view of the potentials to enhance greater cortical activation of the lesion side by eliciting spare neural pathways through bilateral intervention, this study examined whether the combined use of bilateral TENS (Bi-TENS) and task-oriented training (TOT) was superior to unilateral TENS(Uni-TENS)+TOT, placebo-TENS+TOT and no active treatment to improve the motor impairment of upper limb function in people with stroke. Method: There were 120 subjects with stroke(44 females, mean age=61.52±6.73 years, post-stroke duration=6.04±3.12years) being randomly allocated into 4 groups, including the Bi-group (n=30), Uni-group (n=30), placebo group (n=30) and control group (n=30). Subjects in the Bi-group, Uni-group and placebo group got 60 minutes TENS and TOT simultaneously per time for 20 times(3 times per week for 7 weeks). In the Bi-group, TENS stimulated the radial and median nerves of the bilateral upper limbs. In the Uni-group, TENS and placebo-TENS stimulated the affected and unaffected side, respectively. In the placebo group, placebo-TENS were placed on bilateral sides. In the control group, subjects did not receive any active treatment. Level of motor impairment was assessed by the Fugl-Meyer Assessment of Upper Extremity (FMA-UE). Result: The Bi-group had a significant greater improvement in FMA-UE than the Uni-group(mean change=2.02, p=0.005), placebo group (mean change=2.49, p=0.001) and control group(mean change=3.08, p<0.001) at post-intervention. The Bi-group(mean change=3.25, p<0.001) and Uni-group(mean change=1.23, p=0.015) showed a significant within-group improvement in FMA-UE since 10 sessions of treatment. No significant change was found in the placebo and control groups. Conclusion: Bi-TENS is superior to Uni-TENS, placebo-TENS and no active treatment in augmenting the recovery of upper limb motor impairment in people with chronic stroke. Author Disclosures: The authors received research support from the Health and Medical Research Fund12131821 from the Food and Health Bureau, HKSAR.