Nerve | Stimulation sites | CMAP | DML/conduction velocity (ms / m/s) | F waves | |||||
---|---|---|---|---|---|---|---|---|---|
Amplitude (distal)/ amplitude reduction (mV / %) | Duration increase (%) | Area reduction (%) | Minimal latency (ms) | n | |||||
R Med | W Ep Ax Er | 7.0 / 11 −8 −10 | 1 0 0 | 17 9 −24 | 4.4 / 50 4252 | 37 | 14 | ||
L Med | W Ep Ax Er | 5.5 / 18 −11 0 | 0 0 5 | 21 8 0 | 3.8 / 51 57 58 | 33 | 16 | ||
R Med (F) | Ep Ax Er | 9.1 / −13 0 | 5 0 | −16 0 | 4.1 / 56 50 | — | |||
L Med (F) | Ep Ax Er | 4.5 / 0 0 | −10 15 | 0 0 | 3.3 / 53 73 | — | |||
R Uln | W Ed Ep Ax Er | 4.2 / 14 3 9 16 | 5 0 0 0 | 11 −4 7 7 | 3.3 / 55 45 58 53 | 36 | 17 | ||
L Uln | W Ed Ep Ax Er | 4.2 / 10 8 9 23 | 0 0 0 0 | −5 6 4 20 | 3.3 / 59 50 55 61 | 34 | 17 | ||
R Rad | Ax Er | 1.3 / 2 | 21 | −18 | 2.1 / 50 | — | |||
L Rad | Ax Er | 2.1 / 20 | 0 | 19 | 3.3 / 60 | — | |||
R Mus | Ax Er | 0.3 / 0 | 0 | 0 | 4.0 / 57 | — | |||
L Mus | Ax Er | 0.5 / 17 | −4 | 36 | 3.1 / 63 | — | |||
R Per | An Fd Fp | 0.2 / 0 20 | 0 0 | 0 0 | 6.6 / 27 59 | NR | |||
L Per | An Fd Fp | 0.3 / 0 0 | 13 0 | 0 0 | 7.1 / 29 32 | 73 | 3 | ||
R Tib | An P | 3.3 / 36 | 8 | 15 | 5.3 /39 | 62 | 13 | ||
L Tib | An P | 3.1 / 32 | 14 | 34 | 4.9 / 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.