A medical device is capable of delivering a form of stimulation (e.g., electrical stimulation) to a region of the cingulate cortex of the human 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 device additionally or alternatively may be capable of detecting a biological marker or changes in a biological marker corresponding to the neurological event, condition or disorder. Methods of using the device are also disclosed.