FIG. 4.

Correlations of anterior cingulate with the brain. (A) Red highlight shows the seed region. (B) The correlation maps with the entire time series. (C) Windowed correlation maps demonstrating clear changes in correlations over time. Specifically, the blue circled image shows clearly the motor cortex region demonstrating a periodic anticorrelation with anterior cingulate. (D) Time series signal of the anterior cingulate and the motor cortex. (E) Time series of correlation values between the anterior cingulate and motor cortex. While the average correlation is zero, the signals increase and decrease; however, it is difficult to infer that the networks are communicating. They may just be beating against each other. Reproduced with permission from Figure 1 of Handwerker and coworkers (2012).