Effects of electromyographic biofeedback therapy combined with mirror therapy on lower limb motor and balance function in stroke patients / 中国康复医学杂志

Objective:To study the influence of electromyographic biofeedback therapy(EMGBFT)combined with mirror therapy(MT)on lower limb motor and balance function in stroke patients. Method:Sixty patients with hemiplegia after stroke were randomly divided into two groups:MT based EMG-BFT group and EMGBFT group,30 patients in each group.On the basis of conventional rehabilitation,the patients in the EMGBFT group received sham MT stimulation combined with EMGBFT,and the patients in the MT based EMGBFT group received MT combined with EMGBFT.Before and after treatment,the lower limb motor function of the patients was evaluated using Fugl-Meyer assessment scale-lower extremity(FMA-LE)and surface electromyography-integrated electromyography(iEMG)of knee flexion and ankle dorsiflex-ion,co-contraction ratio(CR).Plantar pressure-symmetry index(SI)of mean pressure and contact area of both feet,elliptical area of body center of gravity,anteroposterior(AP)and mediolateral(ML)displacement distance of body center of gravity under eye-opening and eye-closed states were calculated to evaluate pa-tients'weight-bearing and balance function. Result:After treatment,FMA-LE,CR and iEMG of biceps femoris and rectus femoris under knee flexion,tibialis anterior and medial gastrocnemius under ankle dorsiflexion were markedly ameliorated in the two groups(P＜0.01).After treatment,in the eye-opening state,the SI of mean pressure and contact area of both feet,elliptical area of body center of gravity,AP and ML displacement distances of body center of gravity were greatly enhanced in the two groups(P＜0.05,P＜0.01),in the eye-closed state,the SI of mean pressure and contact area of both feet,ML displacement distances of body center of gravity were observably ameliorat-ed in the two groups(P＜0.05,P＜0.01).Compared with the EMGBFT group,the FMA-LE,iEMG of biceps femoris and tibialis anterior muscles,elliptical area of body center of gravity,AP and ML displacement dis-tance of body center of gravity with eyes open,SI of contact area of both feet with eyes closed had more significant changes in the MT based EMGBFT group after treatment(P＜0.05,P＜0.01). Conclusion:Electromyographic biofeedback therapy combined with mirror therapy can improve lower limb motor and balance function in stroke patients,the underlying mechanism of which may be the activation of lower limb weak muscle motor units,the relief of lower limb spasm,and the improvement of standing static balance ability.

Behavioral Effect on Workers in Public Places of Different Environmental Quality / 环境与健康杂志

In this paper,the behavioral effects on workers in public places of different environmental quality were studied-172 workers of three public places were selected,and the values of environmental quality were determined 1.226,0.948 and 0.876.The results showed that statistically significant differences were found in average reaction time and the fastest reaction time among the three groups,environmental quality being one of risk factors,and that most scores of tests in three groups corresponded to the values of environmental quality and a significant correlation existed between some scores and the values of environmental quality