Table 1

Electrophysiological features of the patient who responded to IVIg therapy

NerveStimulation sitesCMAPDML/conduction velocity (ms / m/s)F waves
Amplitude (distal)/ amplitude reduction (mV / %)Duration increase (%)Area reduction (%)Minimal latency (ms)n
R MedW Ep Ax Er7.0 / 11 −8 −101 0 017 9 −24 4.4 / 50 4252 37 14
L MedW Ep Ax Er5.5 / 18 −11 00 0 521 8 03.8 / 51 57 58 33 16
R Med (F)Ep Ax Er9.1 / −13 05 0−16 04.1 / 56 50
L Med (F)Ep Ax Er4.5 / 0 0−10 150 03.3 / 53 73
R UlnW Ed Ep Ax Er4.2 / 14 3 9 165 0 0 011 −4 7 73.3 / 55 45 58 53 36 17
L UlnW Ed Ep Ax Er4.2 / 10 8 9 230 0 0 0−5 6 4 203.3 / 59 50 55 61 34 17
R RadAx Er1.3 / 221−182.1 / 50
L RadAx Er2.1 / 200193.3 / 60
R MusAx Er 0.3 / 0004.0 / 57
L MusAx Er 0.5 / 17−4363.1 / 63
R PerAn Fd Fp 0.2 / 0 200 00 0 6.6 / 27 59 NR
L PerAn Fd Fp 0.3 / 0 013 00 0 7.1 / 29 32 73 3
R TibAn P3.3 / 368155.3 /39 62 13
L TibAn P3.1 / 3214344.9 / 39 64 16
  • Neurophysiological features of the patient who responded to IVIg treatment. Investigated nerves: R=right; L=left; Med=median nerve, recording of CMAP from the abductor pollicis brevis muscle; Med (F)=median nerve, recording of CMAP from the flexor carpi radialis muscle; Uln=ulnar nerve; Rad=radial nerve; Mus=musculocutaneous nerve; Per=peroneal nerve; Tib=tibial nerve. Stimulation sites: W=wrist; Ed=5 cm below the elbow; Ep=5 cm above the elbow; Ax=axilla; Er=Erb’s point; An=ankle; Fd=5 cm below the fibular head; Fp=5 cm above the fibular head; P=popliteal fossa; CMAP=compound muscle action potential; DML=distal motor latency; n=number of F waves after 20 stimuli. NR=no response; — =not done; underlined values are abnormal.