A system and method designed to encourage entrainment of brain waves with a therapeutic wave of a predetermined frequency. The system uses antennae to emit a modulated high frequency carrier signal that carries the therapeutic signal. The system can be utilized in modification of brainwave frequencies in a local or global scale and/or in establishing coherence between different cortical regions. The system can be utilized in treatment of individuals suffering from mental disorders and can be utilized to enhance/improve function in otherwise mentally healthy individuals.