PCA brain mappings (P1, P2, P3) associated with clinical history reading (CH), X-ray analysis (XR) and diagnostic decision-making (DG). The normalized loadings for each PCA factor greater than 0.5 in Table 2 were color-coded from yellow to dark-blue to generate the brain maps. The dark-blue areas depicted the electrodes where entropy H(ei) was heavily loaded in the corresponding factor.
Ribas et al. BMC Neuroscience 2013 14:109 doi:10.1186/1471-2202-14-109