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. 2018 Jul 16;12:475. doi: 10.3389/fnins.2018.00475

Figure 1.

Figure 1

The gradual audiomotor evolution (GAE) hypothesis. The GAE hypothesis suggests connections between medial premotor cortex (MPC), inferior parietal lobe (IPL), and primary auditory area (A1) to be stronger in humans as compared to other primates (marked with red lines), suggesting beat-based timing to have gradually evolved. Line thickness indicates the hypothesized connection strength (Adapted from Mendoza and Merchant, 2014 and Merchant and Honing, 2014).