FM7.1 | Regional Injuries: Head, Neck, Trunk, Limbs & Spine — Summary & Reflection

KEY TAKEAWAYS

Scalp wounds follow the standard wound classification (abrasion, contusion, laceration, incised). Skull fractures — linear, depressed, pond, hinge, ring, contre-coup — indicate force magnitude and direction. Intracranial haemorrhages: epidural (middle meningeal artery, biconvex, lucid interval), subdural (bridging veins, crescent, deceleration), subarachnoid (cortical vessels/aneurysm, basal cisterns), intracerebral (parenchymal, contra-coup sites). Coup injury = at impact site; contre-coup = opposite pole, greatest when the moving head decelerates (fall). Neck injuries risk arterial haemorrhage, airway obstruction, and venous air embolism. Chest injuries: rib fractures, flail chest, pneumothorax, haemothorax, tamponade. Abdominal: liver/spleen most commonly injured. Spinal cord: concussion (transient, full recovery), contusion, laceration, haematomyelia (permanent). IPC 319 (hurt), IPC 320 (8 categories of grievous hurt), IPC 299–300 (culpable homicide/murder) are the legal framework for regional injury opinions.

REFLECT

Consider the following scenario: a 70-year-old man with known hypertension and advanced cerebral atrophy is allegedly struck once on the head with an open hand. He develops a large chronic subdural haematoma and dies. The defence argues the death was due to the pre-existing cerebral atrophy (which stretches bridging veins, making them more vulnerable) and hypertension, not the blow. You are asked to testify on causation. Reflect on how the 'thin skull rule' (or 'egg-shell skull' principle) applies in Indian law, and how you would frame your medico-legal opinion on causation in a way that is scientifically accurate, legally relevant, and defensible under cross-examination. What are the limits of your expert opinion versus the judge's legal determination?