Repetition effects in functional ROIs. A–D: integrated percent signal change (TRs 3–5) for repeated (intact order) quartets in CA1 (A), CA23/DG (B), perirhinal cortex (PRc; C), and parahippocampal cortex (PHc; D). E–H: corresponding percent signal change time courses for CA1 (E), CA23/DG (F), PRc (G), and PHc (H). Values are means ± SE of subjects. Functional ROIs were created from the contrast of 1-back trials > baseline and thresholded at t > 0.675.