The Study On Coordination In The Patient With Lumbar Disc Herniation During Walking

Objective: To study the different of walking coordination between the patientswith Lumbar Disc Herniation（LDH）and the healthy subjects. Methods:Wecollected13healthy subjects and13patients with LDH, and put the LED（Light emitting diodes） markers on their body.The participants should bewalking with the following speed:1.0km/h2.5km/h4.0km/h and1.0km/h,and at each speed they should walk with two different stride length (natural stepand bid step). All8conditions were randomly selected. The kinematicparameters of each body segments were calculated and compared. Thesekinematic parameters include transverse rotation amplitude （TRA） andrelative fourier phase(RFP).Results:We found the patients had smaller stepwidth，but the spine TRA and arm swing were roughly the same with healthpeople.On the contrary the patients had higher thorax-spine TRA and pelvicTRA. On the other hand,the patients’ thorax-arm RFP is higher than the healthysubjects. But the arm-leg RFP, thorax-leg RFP,lumbar-leg RFP andthorax-pelvis RFP were smaller.Conclusion: Walking strategy in the patientswith LDH had changed. They used bigger walking pace, walked with reducedstep width, but maintained the same amplitude of arm swing as the healthysubjects;They increased the rotation of the pelvis, the rotation of thorax andlumbar relative to the spine.This is to maintain the consistence of spinalrotation.The patients also increased the thorax-arm RFP to maintain the uppertrunk stabilitily; The upper part of body and the lower part tend to more in phase,this can avoid too much and too fast rotation of the spine. The research ondifference of coordination of movement during walking between patients withLDH and healthy subjects will help us to provide theoretical support for clinicaltreatment and rehabilitation.