Normalized N1m source strengths. Group means (n = 9) of the normalized N1m source strength obtained by the test stimulus (TS) following each NFN (NFN1 to NFN5). Error-bars denote the 95 % confidence interval limits for the group means. White and gray bars represent responses from the left and right hemispheres, respectively.
Okamoto et al. BMC Neuroscience 2007 8:33 doi:10.1186/1471-2202-8-33