The four regions are not always active at the same time, but those regions that are show synchronized activity.

Our findings support large amplitude, globally synchronized activity across networks that require a reassessment of regional network amplitude and correlation measures.

In recent years, it has emerged that synchronized activity between distant regions of the brain is important for its information processing capabilities.

We have found these periods to contain discrete, individualized synchronized activity in patient-specific frequency bands ranging from 20 to 40 Hz.