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Table 2 Electrophysiological findings in upper limbs of three probands with CMTX

From: Recurrent episodes of reversible posterior leukoencephalopathy in three Chinese families with GJB1 mutations in X-linked Charcot-Marie-tooth type 1 disease: cases report

 Case1Case2Case3
Median. L
 Conduction velocityM37 m/s(>45)58 m/s(>45)35 m/s(>45)
S38 m/s(>45)50 m/s(>45)NA
 AmplitudeM9.6 mV(>5)5.1 mV(>5)2.9 mV(>5)
S2.0 μV(>15)9.9 μV(>15)NR
 LatencyM4.4 ms(<3)3.6 ms(<3)5.8 ms(<3)
Median. R
 Conduction velocityM27 m/s(>45)53 m/s(>45)35 m/s(>45)
S41 m/s(>45)44 m/s(>45)NA
 AmplitudeM4.2 mV(>5)9.4 mV(>5)2.1 mV(>5)
S2.9 μV(>15)19.8 μV(>15)NR
 LatencyM4.5 ms(<3)3.8 ms(<3)6.8 ms(<3)
Ulnar. L
 Conduction velocityM37 m/s(>45)60 m/s(>45)36 m/s(>45)
SNA52 m/s(>45)NA
 AmplitudeM4.6 mV(>5)5.4 mV(>5)3.9 mV(>5)
SNR7.9 μV(>5)NR
 LatencyM3.6 ms(<3)2.4 ms(<3)5.6 ms(<3)
Ulnar. R
VConduction velocityM36 m/s(>45)57 m/s(>45)30 m/s(>45)
S36 m/s(>45)48 m/s(>45)NA
 AmplitudeM2.7 mV(>5)5.7 mV(>5)4.0 mV(>5)
S5.7 μV(>5)7.4 μV(>5)NR
 LatencyM3.5 ms(<3)2.8 ms(<3)5.2 ms(<3)
  1. M Motor nerve, S Sensory nerve, NA Not applicable, NR Not recordable, (): normal values