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J Neurol Neurosurg Psychiatry 70:232-235 doi:10.1136/jnnp.70.2.232
  • Short report

Mild recurrent neuropathy in CMT1B with a novel nonsense mutation in the extracellular domain of the MPZ gene

Table 1

Electrophysiological results

Nerves Segments MNCV
(m/s)
CMAP amplitude
(mV)
DL
(ms)
TLI
(normal⩾0.34)
SNCV
(m/s)
SNAP amplitude (μV)
Left peroneal Leg 31.8 2.9 5.9 0.39
Knee 38.8 1.9
Right peroneal Leg 33.8 3.6 5.2 0.43
Knee 28 2.9
Left median Forearm 34.2 6.0 3.9 0.37
Palm wrist 43 31.0
Right median Forearm 31 7.0 5.8 0.27
Palm wrist 40 17.2
Left ulnar Forearm 43.8 6.1 2.9 0.39
Elbow 43.3 6.1
Palm wrist 41.3 17.7
Right ulnar Forearm 40.2 7.2 3.5 0.49
Elbow 52.6 6.0
Palm wrist 43.3 15.5
Right sural Lower leg-ankle ND 0
Left sural Lower leg-ankle ND 0
  • ND=not determinable; average (SD) control values: MNCV, median=55 (4.5), DL=3.8 (0.4), CMAP amplitude=12 (2.4); ulnar=54.6 (3.6), DL=2.6 (0.3), CMAP amplitude=9.5 (2.5); peroneal : 49 (5.5), DL=4.5 (0.6), CMAP amplitude=6.3 (1.6); SNCV, median=52 (3.5); SNAP amplitude=12.5 (3.4); sural=48 (4); SNAP amplitude=16 (4.5).

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