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. 2008 Feb 27;3(2):e1702. doi: 10.1371/journal.pone.0001702

Figure 2. Results of Experiment 1.

Figure 2

Mean percent changes of log-transformed MEP amplitude from hand muscles (FDI and ADM) versus the control condition Basal (the 100% reference line). The condition “Neutral” (N) was similar to Basal. Sniffing unimodal olfactory (O), bimodal olfacto-gustative (OG), and natural odorants as coffee and mortadella increased MEPs' size. Such facilitation of corticospinal output disappeared when sniffing odorants with a trigeminal component (OT and OTG, grey area). Notably, no cognitive tasks except sniffing are required to subjects. Statistics are in the text.