TAG Sync targets the default mode network of the brain. It was invented by Douglas Dailey. It emphasizes the theta, alpha, and gamma frequency bands through neurofeedback. He chose the developing midline anterior to posterior theta alpha synchrony which characterizes the brains of mammals, networks of neurocognitively mature adults and advanced synchronization features of mindfulness practitioners. This method depends on phase resets in the brain which indicate more frequent updates in the operational state.