Figure A2.

Spatial distribution of oxy-hemoglobin waveform 2. Colors within channels indicate normalized weights for this waveform according to the color bar. (A) LRC Group. Compared to the neutral condition, there is an increase in right lateral distribution of Cluster 2 during the smiling condition, and a focally increased frontal weight. (B) HRA group. There is increased right lateral distribution of Cluster 2, but without a focal increase of weight. The spatial distribution of frontal weights is reduced between the neutral and smiling conditions.