emg_myopathy 1 4000 110337 emg_myopathy.dat 16 10000/mv 16 0 -50 -6380 0 EMG # : 57 : M # : myopathy due to long history of polymostis # : steroids, low-dose methotrexate # EMG from 25mm concentric needle electrode placed in tibialis anterior muscle # patient dorsiflexed the foot gently against resistance, then relaxed