What is a lucid interval, and with which head injury is it classically associated?

What is a lucid interval, and with which head injury is it classically associated?

• A. A temporary recovery of consciousness after initial loss, followed by rapid deterioration
• B. A brief return of consciousness with no subsequent decline
• C. A complete and lasting recovery after a head injury
• D. A brief period of coma without any recovery

Answer: (A)

A lucid interval is a temporary return of consciousness after an initial loss of consciousness following a head injury, followed by rapid neurological deterioration as an expanding intracranial hematoma increases pressure. This pattern is classically seen with an epidural (extradural) hematoma, usually from a rupture of the middle meningeal artery often associated with a temporal bone fracture. The initial injury may knock the person out, then they seem to wake up and feel normal for a short time, and soon headache, confusion, vomiting, or a deteriorating level of consciousness develop as the hematoma grows. This sequence distinguishes it from scenarios where there is no subsequent decline, or where recovery is complete and lasting, or where there is only a brief coma without recovery.

A lucid interval is a temporary return of consciousness after an initial loss of consciousness following a head injury, followed by rapid neurological deterioration as an expanding intracranial hematoma increases pressure. This pattern is classically seen with an epidural (extradural) hematoma, usually from a rupture of the middle meningeal artery often associated with a temporal bone fracture. The initial injury may knock the person out, then they seem to wake up and feel normal for a short time, and soon headache, confusion, vomiting, or a deteriorating level of consciousness develop as the hematoma grows. This sequence distinguishes it from scenarios where there is no subsequent decline, or where recovery is complete and lasting, or where there is only a brief coma without recovery.