Figure 1.
Trial design for (A) an explicit and (B) an implicit emotional Go/Nogo tasks.
In explicit task, subjects pressed a response button or inhibit their behavior according to the facial expression (sad/neutral). While in implicit task, subjects made their motor actions based on the facial gender (male/female).
Figure 2.
Grand averages evoked by negative (red lines) and neutral (black lines) stimuli in Nogo (left column) and Go trials (right column) under implicit (solid lines) and explicit conditions (dash lines) at Fz, Cz and Pz sites (im: implicit; ex: explicit; neg: negative; neu: neutral).
Figure 3.
tPCA: factor loadings after promax rotation.
TF4 (N2) and TF2 (P3) are drawn in black.
Table 1.
Results of the statistical contrasts concerning Trial type (Go and Nogo) ×Emotional condition (negative, neutral) × Task (implicit, explicit) interaction carried out on N2 and P3 extracted spatio-temporal factors.
Figure 4.
sLORETA solutions to non-parametric randomization tests on P3 temporal factor scores showing voxels in which the Nogo>Go contrast was significant (P<0.01).