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. 2008 Sep 11;586(Pt 21):5147–5159. doi: 10.1113/jphysiol.2008.158956

Figure 1. SICI and ICF assessed in the cortical representation of the first dorsal interosseus (FDI) muscle in resting and active conditions.

Figure 1

Mean data obtained from 16 subjects are reported. The effects of four different intensities of the conditioning stimulus (S1) (90% AMT (♦), 80% AMT (▪), 70% AMT (▴), 60% AMT (•)) on the size of the conditioned MEP were evaluated in the FDI muscle relaxed (A) and activated at 10% MVC (B). At rest the best inhibition was obtained delivering a S1 of 90% AMT while during contraction the most efficacious S1 was 70% AMT. At ICF ISIs the highest S1 intensity was able to induce a significant facilitation only in the relaxed muscle. The abscissa indicates interstimulus intervals (ISIs) while the ordinate indicates mean MEP amplitude expressed as a percentage of the S2 given alone. The thin horizontal lines indicate the 100% level. Error bars represent s.e.m.