Which type of brain injury is confined to a specific area of the brain?

• A. Diffuse injury
• B. Focal injury
• C. Global injury
• D. Mixed injury

Answer: (B)

Localization is the key idea here: a brain injury that stays in one specific area is called a focal injury. This pattern comes from damage or disruption that is confined to a single region, so the deficits and imaging findings point to that one spot—for example, a contusion or hematoma affecting a particular lobe. In contrast, diffuse injuries arise from forces that disrupt brain connections across many areas, leading to widespread symptoms and imaging changes rather than a single focal lesion. Global or mixed terms describe broader involvement or a combination of patterns, not a strictly confined area. So the description of being limited to one area best matches a focal injury.