Objective:To seek any correlation of the ratio of knee flexor to knee extensor peak torque (H/Q) with the balance and walking ability of hemiplegic stroke survivors.Methods:Thirty stroke survivors with hemiplegia had the H/Q value of their knees measured at angular velocities of 60°/sec and 120°/sec using an isokinetic muscle strength test. Their motor control ability was assessed using the Pro-Kin balance test system, while their balance and walking were assessed using the Berg balance scale (BBS), the stand-to-walk timing test (TUGT) and the 10m walk test (10MWT). Any correlation was sought between the H/Q value of the affected knee, the test results, stability limits and offset index.Results:The average H/Q values of the affected knee joint at 60°/sec and 120°/sec were significantly lower than those of healthy joints. They were positively correlated with BBS scores and stability limits, and negatively correlated with TUGT and 10MWT times and with the offset indices.Conclusion:The H/Q value of the affected knee of a stroke survivor with hemiplegia predicts balance and walking ability. It may be a useful clinical indicator for evaluating their motor functioning.

Objective:To investigate the immediate curative effect of adjustable knee orthosis in knee hyperextension patients after stroke.Methods:Thirty patients with knee hyperextension patients after stroke admitted to our hospital from June 2019 to December 2019 were selected. The balance and walking function in these patients were evaluated using Bipedal stability and stability limits were evaluated by Pro-Kin 254 beam walking test system, equilibrium function was evaluated by Berg balance scale (BBS), and walking function was evaluated by timed up and go test (TUGT) and ten-meter walking test (10MWT) before and after wearing the adjustable knee orthosis.Results:Patients after wearing the adjustable knee orthosis had significantly decreased movement length, movement area, standard deviation of the movement trajectory front and rear direction, and standard deviation of the movement trajectory left and right direction, and significantly increased limits of stability as compared with those before wearing the adjustable knee orthosis ( P<0.05). Patients after wearing the adjustable knee orthosis had significantly increased BBS scores, and statistically shortened time of TUGT and 10MWT as compared with those before wearing the adjustable knee orthosis ( P<0.05). Conclusion:The adjustable knee orthosis can improve the bipedal stability and stability limits, and balance and walking functions of knee hyperextension patients after stroke, which is worth of clinical application.