抄録
To establish the evaluation of motor skills, this study investigated the torque curves of target matching task during shoulder external rotation. In this study, subjects were seated on the seat of Biodex System3 with the shoulder abducted at 90 degrees on the scapular plane and the elbow flexed at 90 degrees. The torque curve was recorded during isometric voluntary contraction of the shoulder external rotation with repetitive electrical stimulation of the brachial plexus at the supraclavicular fossa (Erb's point). We analyzed torque curves as follows; 1) pattern classification of torque curves. 2) calculation of total deviate integration against the target torque integration. In the pattern classification of torque curves, we defined 6 patterns as follows; “Early flat”, “Late flat”, “Early peak”, “Late peak”, “N cave” and “M cave”. The evaluation index of pattern classification is useful for analyzing motor skills using feedback control during ramp movement. There were different results of the total deviate integration against the target torque integration in the same torque curve pattern. Therefore, it is also useful to evaluate the motor skill in the same torque curve pattern. We believe those indices of torque curve pattern and total integration against target torque integration will be useful for analyzing the process until the output of voluntary contraction corresponds to the target in motor skill using feedback control.
