The Quantitative Investigation Of Lower Limb Muscle Spasticity Degree In Stroke Patients Based On Surface Electromyography

Objective To explore the correlation between characteristics of surface electromyography(sEMG)from vastus medialis(VM)、rectus femoris(RF)and vastus lateralis(RL)and the Modified Ashworth Scale(MAS)during a passive movement of the the quadriceps femoris in patients with hemiplegia after brain lesion,and further assessment the proportion of Spasticity of the quadriceps femoris.Methods Using the prospective study method.There is no restriction on the age and gender,60 stroke patients with brain infarction and brain hemorrhage from October 2014 to October 2015 in the Rehabilitation Department of Zhejiang University Medical College Affiliated Sir Run Run Shaw Hospital.They were assessed the quadriceps femoris with MAS by a same therapist,and their sEMG of VM、RF and RL were recorded synchronously.Results(1)During the assessment of MAS for stroke patients,the surface EMG signal(SEMG)of VM,RF and RL increased as the MAS grades rising.(2)The Spearman correlation analysis demonstrated that root mean square(RMS)of sEMG from VM(r=0.751),RF(r=0.800),RL(r=0.563)correlated with MAS(P<0.001)when the quadriceps femoris moved passively,as well as the average value of EMG(AEMG)correlated with MAS from VM(r=0.767),RF(r=0.834),RL(r=0.646)(P<0.001).Conclusion The surface EMG signals of VM,RF and RL were correlation with the MAS grades rising when the quadriceps femoris moved passively.The relativity between the signal of RF and MAS is the highest,that is remind us that relieving spasm of RF is main during rehabilitation training,sEMG can present the electrical activities during passive movements of quadriceps femoris,which may help for spasticity assessment and clinical treatment.The AEMG value can be used as a quantitative index to evaluate muscle Spasticity Degree...