Neuropsychological Evaluations are conducted to assess cognitive functioning and determine extent of cognitive impairment. Typically these evaluations are performed on people who have sustained concussion, traumatic brain injury, acquired brain injury (i.e. stroke or tumors) as well as suspected degenerative dementias. Evaluations typically involve a battery of performance- based tests that include skills such as memory, attention, processing speed, reasoning, judgment, and problem-solving, spatial, and language functions. By testing a range of cognitive abilities, and examining patterns of performance in different cognitive areas, inferences can be made to help understand underlying brain function, differential diagnosis and make recommendations for rehabilitation.