summarize this in simple terms:These conditions used a visual repre- sentation of the schematic stimuli used for the sound-encoded stimuli or photographs of real faces, geometrical shapes or houses (see Fig 1C). Stimuli were presented in a block design (faces, houses, shapes), with the order of the blocks randomized across the four fMRI runs, two for the schematic stimuli and two for the real "objects". There were 9 blocks in each run. In each block, 48 images were presented for a duration of 600 ms. Each block was followed by a 12-s rest period. A fixation point was displayed (500 ms) at the center of the screen during inter-stimulus intervals and resting periods