The Impact Of Foot Position On Lower Limb Loading And Electromyography Activity In Hemiplegic Stroke Patients During The Sit-To-Stand Movement

ObjectiveTo investigate the effects of different foot positions on the lower limb loading and the electromyography activity during the sit-to-stand movements with hemiplegic stroke patients.MethodsHirty hemiplegic stroke patients were recruited as the experiment group.The subjects completed sit-to-stand movements with 3 different foot positions: symmetric;asymmetric-1,with the affected foot behind;and asymmetric-2,with the unaffected foot behind.surface electromyography(model JE-TB)and Gait and balance function training and assessment system(model AL-080)were used for collecting The surface electromyography(sEMG)activity of the tibialis anterior,gastrocnemius muscle,quadriceps,and hamstring muscles of the affected leg,the time for completing sit-to-stand and the loading of both lower limbs were measured,and the differences between them were investigated.Results1.Complete sit-station transfer under different foot when lower extremity load and the methods of electric parameter comparison: BF compared with PFP,pretibial muscle iEMG,quadriceps iEMG,muscle activity time,sitting-standing time(s),collaborative shrinkage,WBasym has obvious difference(P < 0.05);BF compared with NPFP,gastrocnemius muscle contraction delay time,pretibial muscle iEMG,quadriceps iEMG,muscle activity time,sitting-standing time(s),collaborative shrinkage,WBasym has obvious difference(P < 0.05);PFP compared with NPFP,gastrocnemius muscle contraction delay time,pretibial muscle iEMG,quadriceps iEMG,muscle activity time,sitting-standing time(s),collaborative shrinkage,WBasym has obvious difference(P < 0.05);Remaining indicators no statistically significant difference(P > 0.05).When the PFP,WBasym,pretibial muscle iEMG,quadriceps iEMG value maximum,collaborative minimum shrinkage rate,shows that,under the foot of the lateral load,symmetry,best active muscle maximum,with minimal muscle spasm;When NPFP and muscle activity time and minimum value sitting-standing time,under the foot,sit-transfer station to complete the fastest;Minimum value when NPFP WBasym,collaborative shrinkage rate,the biggest shows that,under the foot of minimum weight,and muscle spasm.2.Complete-stops to transfer under different foot iEMG,collaborative shrinkage and WBasym correlation analysis: under different foot-stops to transfer between iEMG and WBasym correlation analysis showed that the BF(r = 0.423,p = 0.00),the PFP(r = 0.950,p = 0.00),NPFP(r = 0.821,p = 0.00),there was a positive correlation(see FIG.1-3),side lower limb weight increase,active muscle;Synergy between shrinkage and WBasym correlation analysis show that the BF(r = 0.889,p = 0.889),the PFP(r = 0.901,p = 0.901),NPFP(r = 0.863,p = 0.863),collaborative shrinkage rate and are highly negative correlation between WBasym(see figure 4-6),that side of the lower limb weight minimum,and the largest side of the lower limb muscle cramps.Conclusion1.In patients with cerebral apoplexy hemiplegia-stops transfer,foot change the symmetry of double lower limbs in patients with load change.Foot-massage after stroke patients with hemiplegia with lateral load when the youngest,and muscle spasm,the largest is beneficial to improve the stability of the sit-transfer station;Plantar side lower limb hemiplegia patients when placing after load,the largest of the lateral load,symmetry,best active muscle,and muscle spasm,smallest favor lower limb function recovery.2.Cerebral apoplexy hemiplegia patients under different foot-stops when transfer side lower limb weight was positively correlation with active side lower limb muscle,side lower limb weight increase,the active muscle;And side lower limb antagonist muscle and lateral lower limb weight are highly negative correlation,that side of the lower limb weight minimum,and the largest side of the lower limb muscle cramps.