An implantable medical device is capable of delivering a form of therapy (e.g., electrical stimulation) to a region of the cingulate cortex of a patient's brain to treat a neurological event, condition or disorder, especially an event, condition, or disorder that is psychiatric in nature, such as depression, bipolar disorder, anxiety and obsessive-compulsive disorders, post-traumatic stress disorder, addiction, schizophrenia, and autism and other developmental disorders. The apparatus is also capable of detecting a signal corresponding to a characteristic of the psychiatric disorder. Methods of using the apparatus are also disclosed.