Methods and apparatuses are described for monitoring synchronization of two or more brain areas and delivering an electrical therapy to the brain to facilitate synchronization of the two or more brain areas. The electrical therapy can be titrated to improve synchronization between the two or more areas of the brain based on the one or more signals, the synchronization between the two or more areas of the brain occurring in response to the patient being exposed to external sensory stimulus, wherein the electrical therapy does not independently cause activation of either of the two or more areas of the brain.
