Evaluation And Analysis Of AIS Corrective Actions Based On Vicon Three-dimensional Motion Capture Technology And Surface Electromyography

Research purposes:Adolescent idiopathic scoliosis(AIS)is an unexplained three-dimensional spinal deformity,and its incidence is on the rise in my country.The treatment of AIS include surgical treatment and conservative treatment.Conservative treatment includes braces and physiotherapeutic scoliosis specific exercises(PSSE).PSSE is generally recommended for mild AIS,while for moderate AIS,brace combined with PSSE is used.The brace has been proven to be an effective treatment for AIS.However,the efficacy of PSSE still lacks high-quality research confirmation.This study intends to construct AIS orthopedic movements,using Vicon three-dimensional motion capture system and surface electromyography to explore the effectiveness of different orthopedic movements,and to provide a scientific basis for future AIS sports rehabilitation treatment.Research objects and methods:The subjects of the study were from patients with mild to moderate AIS who were intensively trained at the Guangdong Youth Scoliosis Sports Rehabilitation and Orthotics Engineering Technology Development Center during the period from2018.1 to 2020.1.A total of 15 subjects were enrolled,including 8 cases of Rigo A3(all of them).Age 13.25±1.67 years old,main chest curve 27.3±4.7,lumbar curve19.9±3.4°,7 cases of Rigo B1 type(13.14±2.04 years old,chest curve 21.6±8.4 °,main lumbar curve 29.1 ± 9.3 °).All subjects Participants perform 3D correction of sitting posture,3D correction of pole standing,muscle-cyclinder exercise,Schroth strengthening exercise,left and right side bridge,prone and left and right psoas muscle strengthening exercise,left and right sidelying apical expansion,using Vicon three-dimensional motion capture system The three-dimensional motion parameters of the spine shape and the surface EMG of the paravertebral muscles of the scoliosis and apex vertebrae are detected synchronously with the surface electromyography.The observation indicators of the three-dimensional motion capture system are the coronal movement distance and the horizontal plane rotation angle.The paramuscular activation state is expressed by the root mean square value(RMS).all data were expressed by means and 95% CI.Before and after the corrective action,the changes in the coronal and horizontal motion parameters of the Vicon spine and the RMS ratio of the surface electromyography of the thoracic and lumbar paraspinal muscles(compared with the natural standing posture)were tested by paired-sample T test to further calculate Cohen’s d.Research result:1.The result display of the 3D motion capture system:(1)Left bridge,Schroth strengthening exercise,prone left psoas major muscle strengthening exercise,3D correction of sitting posture,left sidelying apical expansion,3D correction of pole standing,muscle-cyclinder exercise can all make A3 patients chest,The coronal and horizontal planes of the lumbar curve were corrected,and there was a significant difference after paired T test(P<0.05).The right bridge is not effective for correcting the coronal plane of the thoracic curve;the right prone psoas muscle strengthening exercise is not effective for correcting the coronal and horizontal plane of the lumbar curve;the right sidelying apical expansion is not effective for correcting the coronal and horizontal plane of the lumbar curve.(2)The right bridge,Schroth strengthening exercise,3D correction of sitting posture,strut stand side shift 3D correction,muscle cylinder,prone right psoas major muscle strengthening exercise,left sidelying apical expansion can all make B1 patients chest,The coronal and horizontal planes of the lumbar curve were corrected,and there was a significant difference after paired T test(P<0.05).The left bridge is not effective in correcting the coronal plane of the lumbar curve;the left psoas muscle strengthening exercise on the prone position is not effective in correcting the coronal and horizontal plane of the lumbar curve;the right sidelying apical expansion is not effective in correcting the coronal and horizontal plane of the lumbar curve.2.The surface EMG results show:(1)In the natural standing posture,the RMS EMG ratio of the concave/convex side of the paraspinal muscles of the apical paraspinal muscles of Rigo A3 type is 0.64(95%CI:0.53,0.76),and Rigo B1 type is 1.37(95%CI:1.26,1.49);The RMS EMG ratio of the concave/convex side of the paraspinal muscles of the top vertebrae of Rigo A3 lumbar curve is 2.84(95%CI: 2.50,3.17),and Rigo B1 is 0.35(95%CI: 0.11,0.58).(2)Rigo A3,left side bridge,the concave/convex RMS EMG ratio of the paraspinal muscles of the paraspinal muscles of the thoracic curve were 1.35(95%CI:1.02,1.67),there is a significant effect size compared with the natural standing posture;the left side bridge,the concave/convex RMS EMG ratio of the paraspinal muscles of the lumbar vertebrae were 1.29(95%CI:1.18,1.41),compared with the natural standing posture,have a significant effect;while other movements have no significant effect on restoring the balance of the thoracic and lumbar paraspinal muscles.(3)Rigo B1,Schroth intensive exercise,and the RMS EMG ratio of the concave/convex side of the paraspinal muscles of the thoracic curve during the right bridge are 0.64(95%CI: 0.29,0.98)and 1.04(95%CI: 0.75,1.32),there is a significant effect size compared with the natural standing posture;the Schroth strengthening exercise and the RMS EMG ratio of the concave/convex side of the paraspinal muscles of the lumbar vertebra during the right bridge are 0.74(95%CI:0.54,0.95),1.71(95%CI:0.64,2.79),compared with the natural standing posture,have a significant effect size;while other movements have no significant effect on restoring the balance of the thoracic and lumbar paraspinal muscles.Conclusion:The three-dimensional motion capture system combined with surface EMG shows that the left bridge have a better correction effect on Rigo A3 type and promote the effect of concave/convex side EMG balance;while the right bridge and Schroth enhanced exercise have better effect on Rigo B1 type and promote the effect of concave/convex side EMG balance.