End
1 :

Hint : 🧠 Brain stem = extension

Correct Answers:

  • Dysfunction in the brain stem.


Rationale :

🔷 Decerebrate posturing (extension of arms/legs, pronation) reflects brain stem injury below the red nucleus.

🔷 Loss of inhibitory cortical input lets extensor tone dominate via vestibulospinal tracts.

🔷 Often linked to herniation, pontine injury, or severe metabolic insult affecting the brain stem.

🔷 Compared with decorticate, decerebrate signals worse prognosis because of lower‑level involvement.

🔷 Immediate focus is on airway, ventilation, and ICP control due to risk of deterioration.


Distractor Analysis :

Rationale for Incorrect Options to be Available Soon

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