Fig. 2

A Averaged hemodynamic responses in BA45 in each 10-s bin during Improv and Formulaic task conditions. The activation magnitude in the analysis windows of each 10-s bin (Fig. 1A–D, #1–3) and their 1-SEM range are shown during Improv (open bar) and Formulaic (closed bar) tasks in BA45R and BA45L (red for oxyHb and blue for deoxyHb). (B) Averaged time-courses of hemodynamic responses by subtraction analysis from Improv to Formulaic of BA45 in the left and right hemispheres. Red and blue lines show oxyHb and deoxyHb responses, respectively. Thick and thin traces represent the mean response amplitude and its 1-SEM range, respectively. The gray areas and three vertical dashed lines indicate the task duration and each bin (#1–3) divided by 10 s, respectively