Which movement pattern is described by arms adducted and flexed with wrists and fingers flexed, and legs extended with internal rotation?

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Multiple Choice

Which movement pattern is described by arms adducted and flexed with wrists and fingers flexed, and legs extended with internal rotation?

Explanation:
This is decorticate rigidity. It reflects damage to motor pathways above the red nucleus. The upper limbs flexed and adducted with wrists and fingers flexed, while the legs stay extended and internally rotated, create a characteristic posture indicating cortical or internal capsule injury. This pattern differs from decerebrate rigidity, where the arms are extended and the legs extended, signaling brainstem involvement below the red nucleus. Chorea and tics are involuntary movements, not sustained posturing, so they don’t describe this pattern.

This is decorticate rigidity. It reflects damage to motor pathways above the red nucleus. The upper limbs flexed and adducted with wrists and fingers flexed, while the legs stay extended and internally rotated, create a characteristic posture indicating cortical or internal capsule injury. This pattern differs from decerebrate rigidity, where the arms are extended and the legs extended, signaling brainstem involvement below the red nucleus. Chorea and tics are involuntary movements, not sustained posturing, so they don’t describe this pattern.

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