Electroneurographic parameters demonstrate the typical delay of distal motor latency, and F-wave latency and decrease of conduction velocity, as well as decreased amplitudes at compound muscle action potential. There was mild decrease of conduction velocity of sensory nerve action potential changes at the arm nerves. The findings are basically consistent with acute motor accented and axonal demyelinating neuropathy (Table 1).
Table 1 Nerve conduction study parameters day 10
Nerve stimulated Stimulation SITE Amplitude (m in mV; s in µV) Latency (ms) Conduction velocity (m/s) F-Wave (ms)/F-wavepersistence (%)
Right Left Norm Right Left Norm Right Left Norm right left Norm (height 175 cm)
Medianus (s) Wrist 8.9 17.2  ≥ 6 3.7 4.25 3.2 35 33  ≥ 44
Ulnaris (s) Wrist 10 31  ≥ 5 2.7 3.15 2.8 40 35  ≥ 44
Suralis (s) Calf 9 9  ≥ 5 2 2.1 2 49 50  ≥ 40
Medianus (m) Wrist 5 5.6  ≥ 3.5 6.6 6.2  ≤ 4.2 39.7/80 33.6/30  ≤ 31/50–100
Antecubital fossa 4.2 5.6  ≥ 3.5 12.1 10.9 44 45  ≥ 50
Ulnaris (m) Wrist 0.7 1.8  ≥ 2.8 4.6 4  ≤ 3.4 35 33  ≤ 31/50–100
Below elbow 1.2 0.7  ≥ 2.8 11 11.2 39 35.9  ≥ 48
Tibialis (m) Ankle 1.5 0.9  ≥ 2.9 4.9 7.9  ≤ 6 nr 73/20  ≤ 58/50–100
Popliteal fossa 0.5 0.3  ≥ 2.9 16.4 19.8 33 33  ≥ 41
Peroneus (m) Ankle 2.2 2.1  ≥ 2.5 3.5 5.1  ≤ 5 70/30 66/20  ≤ 57/50–100
Fibula 0.57 0.69  ≥ 2.5 14.1 15 30 33  ≥ 40
nr no response