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. 2019 Aug 14;9(8):200. doi: 10.3390/brainsci9080200

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Examples of MEPs recordings in MPS patients. (A) normal MEP from the upper limb; (B) MEP with reduced amplitude and polyphasic shape from the upper limb; (C) normal MEP from the lower limb; (D) absence of transcranially-induced motor response from the lower limb. MPS = mucopolysaccharidosis; Magnetic stim = transcranial magnetic stimulation; R ULNAR = right ulnar nerve; R COMM PERONEAL = right common peroneal nerve; FDI = first dorsal interosseous muscle; TA = tibialis anterior muscle; MEP = motor evoked potential; 50 ms = temporal resolution of the screen (sweep) for upper limb recordings; 100 ms = temporal resolution of the screen (sweep) for lower limb recordings; 500 µV = amplification factor of the screen.