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[Purpose] Lower-limb spasticity after stroke may be associated with worse functional outcome. Our study aim was to establish whether a low-dose botulinum toxin A (BTX-A) injection in subacute stroke patients can improve spasticity, gait, and daily living abilities. [Subjects] Twenty-three subacute stroke patients were randomly allocated to BTX-A treatment group (11 patients) and control group (12 patients). [Methods] In the BTX-A treatment group patients, 200 units BTX-A was injected into the triceps surae (150 iu) and posterior tibial (50 iu) by electrical stimulation-guided. The patients in the control group received the same volume of placebo solution into the same injection locations. Gait analysis (step length, cadence, speed), the 6-min walking test, Fugl-Meyer Assessment (FMA) of the lower limbs, modified Ashworth scale assess (MAS) assessment of the lower limbs, surface electromyography (sEMG), and modified Barthel index (MBI) assessment were performed before and at 4,8 weeks after treatment. [Results] We found that the FMA of the low limbs and MBI were significantly improved in both groups. The gait analysis, FMA, and MBI results in the BTX-A treatment group were better than those in the control group. MAS and surface electromyography (sEMG) showed better improvement of spasticity in the treatment group. [Conclusion] Early low-dose botulinum toxin A (BTX-A) injection in subacute stroke patients into the lower-limb may improve gait, spasticity, and daily living abilities.

Gait improvement by low-dose botulinum toxin A injection treatment of the lower limbs in subacute stroke patients