Influence of Chronic Stroke on Functional Arm Reaching: Quantifying Deficits in the Ipsilesional Upper Extremity

Figure 2

(a) Raw and (b) processed (filtered and rectified) EMG and (c) acceleration, sampled from the anterior deltoid during flexion-reaching, depicting variables of interest. Reaction time (RT) is the times between the final cue and the EMG onset. Burst duration is the time between start and end of EMG signal. Movement time (MT) was defined as the total time interval from the start to the end of the upper extremity movement, taken as the interval between the onset and offset of the acceleration signal. Peak acceleration (PA) was defined as the maximum amplitude of the acceleration signal along the X-axis of the sensor’s coordinate system. Movement initiation time (MIT) is the time after RT to the beginning of the acceleration signal.