the aim of this papers is to study the relation between calf muscles electrical activity
and knee movement during walking for patient with anterior cruciate ligaments injured
(acl) by measurement both of electromyography (emg) and changing of knee
angle by
electro-goniometer. the start and end of the gait cycle were determined by foot sensors, a
program was designed for signal processing of the data, testes were carried out at hamish
hospital in damascus. subjects were divided into two groups: 46 normal subjects and 10
patient. final results showed that the knee cancels its first flexion, there are activity of calf
muscles, .through push period there is no activity of calf, it is offen depend on hamstring
muscles activity early to keep stability of knee. . in swing phase it noted that decrease in
knee flexion.
