Which statement best describes Guillain-Barré syndrome progression?

Which statement best describes Guillain-Barré syndrome progression?

• A. Progressive ascending weakness starting in the legs
• B. Descending weakness starting in the arms
• C. Fixed weakness without sensation changes
• D. Chronic motor neuron degeneration

Answer: (A)

Guillain-Barré syndrome progresses as an acute, inflammatory process of the peripheral nerves that typically starts with weakness in the lower limbs and spreads upward. This ascending pattern—weakness beginning in the legs and moving toward the arms and possibly the respiratory muscles—is the hallmark of GBS and reflects the demyelinating injury to peripheral nerves after an infection. The weakness is often symmetric and is accompanied by decreased or absent reflexes, and sensory changes can occur. That’s why the description of progressive ascending weakness starting in the legs best fits GBS. Describing weakness as descending from the arms would point to a different pattern and condition. A description of fixed weakness without progression or a chronic motor-neuron degeneration also doesn’t align with the acute, evolving course of GBS, which tends to progress over days to weeks and then stabilize before recovery.

Guillain-Barré syndrome progresses as an acute, inflammatory process of the peripheral nerves that typically starts with weakness in the lower limbs and spreads upward. This ascending pattern—weakness beginning in the legs and moving toward the arms and possibly the respiratory muscles—is the hallmark of GBS and reflects the demyelinating injury to peripheral nerves after an infection. The weakness is often symmetric and is accompanied by decreased or absent reflexes, and sensory changes can occur.

That’s why the description of progressive ascending weakness starting in the legs best fits GBS. Describing weakness as descending from the arms would point to a different pattern and condition. A description of fixed weakness without progression or a chronic motor-neuron degeneration also doesn’t align with the acute, evolving course of GBS, which tends to progress over days to weeks and then stabilize before recovery.