Apparatus is provided for modifying a property of a brain of a subject, including at least one electrode, configured to be positioned in a vicinity of a mucous membrane of a palate of an oral cavity of the subject. A control unit is configured to drive the electrode to apply an electrical current to...http://www.google.co.uk/patents/US7908000?utm_source=gb-gplus-sharePatent US7908000 - Transmucosal electrical stimulation
