A nurse is preparing to teach staff about the most common type of traumatic brain injury. Which type of traumatic brain injury should the nurse discuss?

a. Penetrating trauma
b. Diffuse axonal injury
c. Focal brain injury
d. Concussion

ANS: D
A concussion is the most common type of traumatic brain injury. A concussion is a much more common brain injury than penetrating trauma, diffuse axonal injury, or focal injury.