After a brain injury, cognitive rehabilitation treatment (CRT) is a range of therapies aimed at restoring cognitive function. CRTs come in a variety of shapes and sizes. CRT is a general term for a variety of treatments. A systematic and functionally oriented therapeutic cognitive activity directed to achieve functional changes by (1) re-establishing or strengthening previously learned patterns of behaviour or (2) establishing new patterns of cognitive activity or compensatory mechanisms for impaired neurological systems has been defined as cognitive rehabilitation therapy. Over the last three decades, there has been a considerable increase in the rehabilitation of cognitive deficits following brain injury. CRT does not refer to a specific treatment technique because of the vast range of symptoms and degree of cognitive difficulties in people who have had a brain injury.