In a case of blunt head trauma with an epidural haematoma, the 'lucid interval' — a transient period of consciousness before neurological deterioration — is characteristically associated with rupture of which vessel?

• A Bridging cortical veins in the subdural space
• B Anterior communicating artery at the Circle of Willis
• C Middle meningeal artery in the temporal region ✓
• D Superior sagittal sinus at the vertex

Explanation

Classical epidural (extradural) haematoma results from rupture of the middle meningeal artery, typically following a temporal bone fracture from a lateral blow to the head. The initial concussion causes brief loss of consciousness; the patient then regains consciousness (lucid interval) as the haematoma gradually accumulates in the epidural space; progressive haematoma expansion eventually causes transtentorial herniation and secondary deterioration. This lucid interval is characteristic of arterial epidural haematoma. Subdural haematomas (bridging vein rupture) present with chronic progressive decline without a lucid interval.

Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.