Brain injury recovery varies from person to person, even with individuals who have suffered the same type of injury. This is because the rate of recovery, in many cases, is contingent on the level of physical and cognitive care provided to the patient. Brain injury recovery is most rapid shortly after the injury has occurred, and slows down as time goes on. Brain injury recovery can take a lifetime, though many times a person can regain much of their pre-injury abilities within six months to a year. Many rehabilitation facilities take a multidisciplinary approach to brain injury recovery. This employs the assistance and expertise of a number of specialists including psychologists, neurologists, occupational therapists, physical therapists, speech therapists, and cognitive therapists. Because of their specialized training in medications, physiatrists are usually considered the primary treating physician in head injury cases.