MAS) and 10 typically developing participants (four males, six females; mean age 10y 3mo, SD 2y 7mo, range 7-15y). Spasticity and catch angle were evaluated using joint position, resistance torque, and torque rate at velocities of 90°, 180°, and 270°per second, controlled using real-time audio-visual feedback. Biomechanically, elbow range of motion (ROM), stiffness, and energy loss were determined during slow movement (30°⁄ s) and under controlled terminal torque.RESULTS Compared with typically developing children, children with CP showed higher reflexmediated torque (p<0.001) and the torque increased more rapidly with increasing velocity (p<0.001). Catch angle was dependent on velocity and occurred later with increasing velocity (p=0.005). Children with CP showed smaller ROM (p<0.05), greater stiffness (p<0.001), and more energy loss (p=0.003).
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