Which head injury often presents with a brief loss of consciousness followed by a lucid interval and then rapid deterioration?

• A. Cerebral contusion
• B. Epidural hematoma
• C. Subdural hematoma
• D. Concussion

Answer: (B)

The pattern described is characteristic of an epidural hematoma. After a head injury, an arterial bleed—usually from the middle meningeal artery—can cause a brief loss of consciousness, a period of apparent recovery with a lucid interval, and then rapid neurological decline as the hematoma expands and raises intracranial pressure. This quick progression happens because arterial bleeding fills the space faster, so symptoms worsen swiftly after the initial lucid period.

Other injuries don’t fit this pattern as cleanly. A cerebral contusion involves bruising of brain tissue and can cause loss of consciousness, but it doesn’t typically produce a distinct lucid interval followed by a rapid decline. A subdural hematoma results from slower venous bleeding and tends to present with a gradual or fluctuating course over hours to days, not a rapid deterioration after a lucid interval. A concussion is a transient functional disturbance without a hematoma, so there isn’t a lucid interval with sudden decline.

In short, the lucid interval with rapid deterioration points to an epidural hematoma due to arterial bleeding, needing urgent imaging and neurosurgical evaluation.