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. 2013 May;27(4):355–362. doi: 10.1177/1545968312469837

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© The Author(s) 2013

This article is distributed under the terms of the Creative Commons Attribution 3.0 License (http://www.creativecommons.org/licenses/by/3.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (http://www.uk.sagepub.com/aboutus/openaccess.htm).

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Figure 2. — Group mean percentage change in PMEPs amplitude, on the ‘stronger’ (stimulated) (A) and ‘weaker’ (B) pharyngeal projection following different PAS doses and sham stimulation. Increase in amplitude in the ‘stronger’ pharyngeal projection was observed following both repeated PAS_10min (♦) (*P=.001) and single PAS_10min (■) for the initial period after the first application up to 60 minutes (^xP=.012), compared to sham PAS_10min (●). For the ‘weaker’ pharyngeal projection (B) only repeated PAS10min resulted in significant increase in cortical excitability (*P=.025). Abbreviations: PMEP, pharyngeal motor evoked potential; PAS, paired associative stimulation.