The N170 was sensitive to emotional context: N170 amplitudes were larger to the fearful versus neutral (top left) and happy (top right) faces. Also, the N170 was greater to no-go versus go stimuli (bottom left, bottom right), but only in a context including neutral faces (fear-neutral or happy-neutral).
*Note. FN = fear-neutral block; HN = happy-neutral block; FH = fear-happy block