Biofeedback Stroke Stance Phase and Single Support Phase
Description
Temporal parameters included gait cycle (GC) duration, sec; Cadence or stride rate, steps/min; foot clearance (Cl), cm; walking speed (V), km/h; stride length (SL), cm. Individual time periods of GC (measured as % from GC): stance phase (SP), single support phase (SSP), and the total period of double support phase (DSP). Recording of kinematic parameters was carried out from the joints of the lower ex-tremities: hip, knee, and ankle in the sagittal plane (flexion – extension). The software automatically generated goniograms (a function of angle versus time) for each joint in a standard gait cycle format. The maximum amplitude over GC (HA, degrees) was recorded in the hip joint. For the knee joint: first flexion amplitude (Ka1), extension amplitude (Ka2), swing flexion amplitude (Ka3). Only the amplitude (AA) over GC was analyzed for the ankle joint.
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Steps to reproduce
The study of biomechanical walking parameters was carried out with the subject walking at the natural speed at a distance of 10 meters. At the end of the distance, the subject made a 180-degree turn in an arbitrary direction and continued moving. The neural network operating in real-time excluded all unsteady or significantly different steps from further analysis. The examination ended when 40 gait cycles had been rec-orded for each lower extremity. An impartial assessment of walking was performed using the Stedis complex (Neurosoft, Ivanovo). With the help of elastic retaining bands seven inertial sensors were placed on the subject’s sacrum, outer of the each thigh, on the outer of the lateral malleolus of each ankle, and the foot instep, on both sides. Each sensor captured the amplitude parameters of the studied joints and functional EMG. Disposable surface Mederen electrodes (China) were used.