Traumatic Brain Injury Several GCS school psychologists have received specialized training and are on the state’s registry of approved providers to conduct psychological assessments of children and youth who have a medically diagnosed traumatic brain injury (TBI). This type of injury is an acquired open or closed head injury caused by an external force that impairs a student’s cognitive, communicative, perceptual, behavioral, social-emotional, and/or physical abilities to the extent that Exceptional Children’s services are required. Congenital degenerative conditions or brain injuries induced by birth trauma are NOT included in this definition. Also NOT included as TBI are strokes, tumors, anoxia, drowning, aneurysms, and drug overdoses. The TBI-registered school psychologist works with the school psychologist serving a particular school to evaluate these students. Both psychologists collaborate closely with the student’s parents and teachers as well as other specialists involved in the student’s care (medical doctors, neuro-psychologists, speech/language pathologists, and physical and occupational therapists).