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. 2017 Apr;78(2):e59–e67. doi: 10.1055/s-0037-1601327

Fig. 4.

Fig. 4

Motor evoked potentials (MEP) screenshots. Comparison between MEP before the dural opening (up) and MEP after the drainage of the syrinx (down): improvement of the conductivity is particularly evident while monitoring left vastus lateralis.