Figure 3.

Networks discovered for arithmetic operations based on six (ventral pathway) regions showing addition and subtraction effects. (A) Addition and subtraction processes shared a network with common endogenous (or fixed) connectivity revealed by non‐redundant parameters in the A matrix; (B) a core network with identical nodes, connections, and modulatory directions (enhancement or suppression with addition and subtraction) was identified; (C) modulatory effects elicited by addition processing; (D) modulatory effects elicited by subtraction processing; Abbreviation: FFG, fusiform gyrus; IPS, intraparietal sulcus; pDLPFC, posterior portion of dorsolateral prefrontal cortex; INS, insula; CAU, caudate; L, left; R, right. [Color figure can be viewed at http://wileyonlinelibrary.com]