Primary Brain Injury Closed Head Injury
Caused by blunt trauma and lead to concussions, contusions, and lacerations of the brain.
Concussion - is characterized by a brief LOC. Damage occurs to the gray matter of the cerebral cortex or possibly to the diencephalon or brain stem. The damage to the axons is functional, not structural, which is why permanent neurologic dysfunction is generally not seen.
Contusion - Contusion is bruising of the brain tissue.