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Developmental changes in area-summation functions in V1 and V2 neurons. Area-summation functions for representative V1 neurons at 2 weeks (a), 4 weeks (b), and 8 weeks (c) and in adult monkeys (d). Three units were chosen for each group based on their quartile values (Q1 = 25%, Q2 = 50%, and Q3 = 75%) for surround suppression (SI). (e–h) Comparable functions for V2 are illustrated.
