| Cervical spondylotic myelopathy (CSM) is the most common spinal corddisorder in persons. Spondylosis refers to the degenerative changes that occur in thespine, including degeneration of the joints, intervertebral discs, ligaments andconnective tissue of the cervical vertebrae. There are three importantpathophysiologic factors in the development of CSM: static mechanical; dynamicmechanical; and spinal cord ischemia. Static mechanical factors result in thereduction of spinal canal diameter and spinal cord compression.Objective According to the change of the lower limbs of Cervical spondyloticmyelopathy (CSM) patients in kinestate biomechanics, we adopted functionalassessment of Cervical spondylotic myelopathy (CSM), isometric muscle strengthtest,, balancing function and Velocity Encoded Cine Phase Contrast MRI(VE-PCMRI) to investigate the maximum isometric muscle strength, the dynamic and staticbalance function and the motor pattern of myoideum in vivo to identify regular pattern of generation and development in Cervical spondylotic myelopathy (CSM);to identify the impact of the disease to the function and daily activities; and at last tofind out the ways of intervention.Methods 30 patients with Cervical spondylotic myelopathy (CSM) werechoiced as the test group, 30 normal adults were choiced as the control group. Theisometric muscle strength test system Good Strengh from Mega company, thebalance test system Good balance from Mega company, the SIMENZ 1.5T MRIand the main software from SIMENZ were adopted.The subjects did the function evaluation of the spine cord through functionevaluation of cervical spondylotic myelopathy.They did maximum isometric musclestrength test when the ankle joint was maintained in the range of flexion of 60°.Themovements of flexion and extention were carried out 3 times each, and each timelasted 5s. Four kinds of static equilibrium tests normal standing with eyes opened(P1), normal standing with eyes closed (P2), feet together with eyes opened(P3),semi Tandem with eyes opened (P4); body weight distribution and a kind ofdynamic equilibrium test were carried out. All of the balance tests were run on theforce platform and were carried out two times. It spent 30s to complete the first threekinds of static equilibrium tests, and 20 s to complete The last static equilibrium test.In the MRI scanner, The kinestates included active and passive moduseses, andeach modus was carried out in 45 minutes with the frequency of 35/s.To the parameters of function evaluation, maximum isometric musclestrength, balance function, age, height, body mass and body mass index,difference between these variables were assessed by two independent simpleStudent's t test. The difference of gender was assessed by chi square test. Thedegree of association between the balance function and the spinal functionevaluation of CSM was estimated using Person, s correlations for object withCervical spondylotic myelopathy (CSM), as well as the muscle strength and thefunctional assessment of Cervical spondylotic myelopathy. All of the statisticalanalysis were performed using SPSS13.0, andα=0.05 was thought to be a accepted level. All the tests were two tailed.Result No significant difference of age, body height, body mass, bodymass index and gender composing ratio between two groups. Patient group andcontrol group were comparable.There were significantly different in statistics in the aspects of spinal function,the data of the test group were much lower than that of the control group (P＜0.01)In the parameters of muscle strength,①The maximum isometric musclestrength of ankle flexion,the maximum ratio of torque of ankle extending divided bybody mass, the maximum vociety of ankle flexion,the maximum loose vociety ofankle extending,the maximum loose vociety of ankle flexion of the control groupsingnificate higher than that of the test group in statistics (P＜0.01).②The degree ofassociation between the maximum isometric muscle strength of ankle extendingdivided by body mass,the maximum isometric muscle strength of ankle flexiondivided by body mass,the maximum vociety of ankle extending,the masimum vocietyof ankle flexion,the maximum loose vociety of ankle extending,the maximum loosevociety of ankle flexion with the spinal cord funtion was significant. All of thecorrelations were positive (P＜0.01).③There are singnifican difference between theafter and before treatment in the test group (P＜0.05).In the parameters of balance function:①The compare of the parameters ofblance function between test group and control group:under the circumstances of P1,the parameters of MYS,MXS,VM,EXD,EYD,R from the test group were significanthigher than that from the control group (P＜0.05); under the circumstances of P2,the parameters of MXS,MYS,VM,EXD,EXD,EYD,R from the test group weresignificant higher than that from the control group (P＜0.05); under thecircumstances of P3, the parameters of MXS,MYS,VM,EXD,EXD,R from the testgroup were significant higher than that from the control group (P＜0.05); under thecircumstances of P4, the parameters of MXS,MYS,VM,EXD,EXD,EYD,R from thetest group were significant higher than that from the control group (P＜0.05); In the dynamic equilibrium test, T and D from the test group was much longer than thatfrom the control group(P＜0.01).②The compare of the parameters of blance functionbetween before and after treatment of test group: under the circumstances of P1,theparameters of blance before treatment of the test group were significant higher thanthat after treatment (P＜0.05); under the circumstances of P2, the parameters ofMXS,MYS,VM,EYD,R before the treatment were significant higher than that aftertreatment (P＜0.05); under the circumstances of P3, the parameters ofMXS,MYS,VM,EXD,EXD,R before treatment were significant higher than that afterthe treatment (P＜0.05); under the circumstances of P4, the parameters ofVM,EYD,EXD before the treatment were significant higher than that after thetreatment (P＜0.05); In the dynamic equilibrium test, there are singnifcatedifference between before and after the treatment (P＜0.05).③In the comparison ofthe test group among four posture, the parameters of MXS,VM,EXD,R weresignificant different in statistics (P＜0.05). To the parameters of the control group,the analogic result was obtained.④The degree of association between the balancefunction and the spinal function of the CSM was estimated. All of the correlationswere negative (P＜0.05).Conclusion There were the descent of the muscles strength, the imbalance ofthe muscles strength, the disturbance of balance function in the patients. Theseabnormalities were associated with the descent of the correlated function of Cervicalspondylotic myelopathy (CSM).
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