Phi complex
The phi complex is a brain rhythm in the awake human brain that appears to serve various social functions. Phi is one of several brain rhythms in the awake human brain that coordinate human behavior. "Phi" operates in the 10-Hz band (ten oscillations per second), and is located above the right centro-parietal cortex. It consists of two components, one favoring independent behaviors, and the other favoring interpersonal coordination between people. The brain wave patterns of the phi complex are consistent with those of waves produced in the human mirror neuron system.