| knee osteoarthritis is perplexing in the elderly and the impact on quality of life of a disease, common disease, has exceeded the traditional"3tall" disease, as in older populations with the highest incidence of disease. Cause osteoarthritis pathogenesis and comes with many, many complications, but most notably decreased muscle strength of joint instability, limb circumference change. So, considering the knee osteoarthritis on lower limb muscle function, a combination of muscle biomechanics and sports medicine and other related knowledge, with period through isokinetic instrument in specific isokinetic motion mode, simulate the daily motion of the lower extremities, the use of surface electromyography equipment to carry out whole process monitoring and evaluation in patients with lower extremity muscles, and contact the bony arthritis pathogenesis, find out the isokinetic mode knee lower power and changes of patients with osteoarthritis of knee joint with each muscle characteristics, to expect the index can effectively judge the extensor and flexor muscle during isokinetic exercise mode, electromyography showed various aspects of the differences, then analyzes the characteristics, thus targeted the patient’s recovery guidance, effective rehabilitation program developed, have a definite object in view. methods:This paper experiments the subjects were30elderly women in unilateral knee osteoarthritis patients, use of Swiss Contrex Mj tp1000fast muscle testing and training system, combined with the Finland megawin company ME6000-T8EMG equipment, on subjects at different angular velocity (180degrees,120degrees,60degrees) under constant radial test, using the mean EMG (AEMG) index of the rectus femoris and vastus medialis muscle (RF),(VM), vastus lateralis (VL), the stock two muscles (BF) surface EMG signal acquisition and recording, analysis of different angular velocity of knee joint under various muscle EMG changes feature, contrast analysis contralateral and ipsilateral extensor and flexor muscle EMG differences, draw a conclusion. Results:1healthy side limb muscle EMG (AEMG) with average velocity changes, the rectus femoris, vastus medialis and vastus lateralis muscles from180°/sto60°/sin the process, a first decreased then increased, the maximum value appeared in60°/s, when120°/sAEMG minimum, at the same velocity, shares the average minimum medial muscle EMG, rectus femoris, vastus lateralis muscle and the stock two muscles were greater than the vastus medialis muscle, the difference was significant (P<0.05).2paretic muscles of average EMG (AEMG) along with the speed of change, the rectus femoris, stock two muscles, medial vastus muscle and vastus lateralis muscle with the velocity decreases, the muscle AEMG are successively larger phenomenon, in180°/sAEMG minimum, maximum and in60°/s; in the same speed, is still the vastus medialis muscle AEMG minimum value, the stock two muscle AEMG greater than the medial vastus muscle, with significant difference (P<0.05), and the rectus femoris and vastus medialis muscle AEMG did not differ significantly, P=(0.363); the vastus lateralis muscle vastus medialis muscle with AEMG no obvious difference (P=0.596).3healthy side limb muscle from180°/sto60°/s three angular velocity, expressed by complete total power AEMG percentage fluctuations. The4lower limb muscles from180°/s to60°/s three angular velocity in180°and120°/s, two kinds of speed mode, the muscle AEMG increases, P displays (P<0.05), has the obvious difference. In120°/sand60°/stwo speed mode, the muscle AEMG although gain, but the P values are shown as (P>0.05), no significant differences. Of course, compared to180°/sand60°/s, difference is very apparent,(P<0.01). Conclusion1.senile knee joint dysfunction of patients with limb muscle strength and shares four biceps muscle activity levels compared with the uninvolved decreased significantly, which shares two muscles are affected to a lesser extent.2.knee joint dysfunction in patients with lower limb muscle in the presence of selective type II fiber atrophy, no obvious muscle endurance down.3.the paretic muscle mobilization rate of decline, in180degrees fast, AEMG minimum value. The4.isokinetic concentric exercise, at180degrees,120degrees,60degrees three speed, knee joint both contralateral or ipsilateral at low speeds, EMG wave maximum, AEMG value of the largest, most required strength.5. the vastus medialis muscle strength in the telescopic movement, muscle strength of lower minimum, working condition.6.BF, RF, VL, VM four AEMG%headers regardless of movement speed, four head contribution percentage basically unchanged, although contralateral and ipsilateral each muscle AEMG%is different, but both sides of health risk in different angular velocity by the respective proportion accounted for little floating, and no obvious difference. |
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