“…The periodicity-specific adaptation and the periodicityspecific displacement in the N1m source location were, however, observed for both the 800 ms-and the 200-ms ISI. Several studies addressing the encoding of sound periodicity have found evidence for a specialized cortical population or populations responsive to sound periodicity (Griffiths et al, 1998(Griffiths et al, , 2001Hertrich et al, 2000;Alku et al, 2001;Patterson et al, 2002;Gutschalk et al, 2004;Penagos et al, 2004;Tiitinen et al, 2005;Soeta et al, 2005;Soeta and Nakagawa, 2008;Lütkenhöner et al, 2006;Hall et al, 2006;Hall and Plack, 2009;Yrttiaho et al, 2008Yrttiaho et al, , 2009Yrttiaho et al, , 2010Lewis et al, 2009;Schönwiesner and Zatorre, 2008;Griffiths et al, 2010). However, the few data sets that pertain to whether aperiodicity is also encoded by the activation of a specialized population do not seem to converge on the issue.…”