Rehabilitation is the act of restoring something to its original state , in that various methods are :Rehabilitation(neuropsychology), therapy to regain or improve neurocognitive function that has been lost or diminished. Rehabilitation (wildlife), treatment of injured wildlife so they can be returned to the wild. Drug rehabilitation, medical or psychotherapeutic treatment for dependency on substances such as alcohol and drugs. Physical medicine and rehabilitation, a branch of medicine that aims to enhance and restore functional ability to those with physical impairments or disabilities. Psychiatric rehabilitation, a branch of psychiatry dealing with restoration of mental health and life skills after mental illness.