Penfield began working on severe epilepsy hoping to find a new surgical approach to treating it. The patient he worked on was given a local anaesthetic to stay conscious during the operation. Penfield removed the skull cap in order to expose the brain tissue. The patient described his feelings while Penfield probed the brain hoping to identify the exact location of the seizure activity. Once found he could hopefully end the patient’s seizures by removing the tissue. This new method cured more than half of the patients treated and become known as the “Montreal Procedure”. Patients began arriving from all around the world. Due to this technique Dr. Penfield was able to create maps of the motor and sensory sections of the brain, which showed their connections to various limbs and organs. The maps are still used today. In 1951, Penfield published this work along with Herbert Jasper.