GBS is characterized by:

Appeared in: AIIMS Delhi NO-2016

Explanation

The hallmark of Guillain-Barré Syndrome (GBS) is acute, rapidly progressing, and relatively symmetric ascending weakness.
This pattern typically begins in the lower extremities (legs and feet) and moves upward to the trunk, arms, and cranial nerves.
The underlying cause is an autoimmune attack on the myelin sheath of peripheral nerves, often triggered by a recent infection.
Loss of deep tendon reflexes (areflexia or hyporeflexia) is another key diagnostic feature that accompanies the weakness.

Option B: Tremors, which are rhythmic, involuntary muscle movements, are not a characteristic sign of GBS.
Option C: While tingling and numbness (paresthesias) are very common and often the first symptoms to appear in GBS, the defining feature of the disease's progression is the ascending motor weakness, not the sensory symptoms.
Option D: Ptosis (drooping eyelid) is not a characteristic feature of classic GBS.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Defining characteristics of Guillain-Barré Syndrome (GBS) as background academic context rather than a clinical decision trigger.
The top nursing priority for a patient with GBS is frequent respiratory assessment (e.g., checking vital capacity, respiratory rate, and effort) because ascending paralysis can rapidly lead to respiratory failure, which is a medical emergency.
Nurses must be vigilant in preventing complications of immobility, such as deep vein thrombosis (DVT), pressure injuries, and contractures, as the patient may be completely paralyzed but fully conscious.
Autonomic dysfunction is common, causing wide fluctuations in heart rate and blood pressure. Continuous cardiac monitoring is essential to detect and manage life-threatening arrhythmias or hemodynamic instability.

How to Approach the Question

First, identify the core subject of the question, which is 'Guillain-Barré Syndrome (GBS)'.
The question asks what 'characterizes' the syndrome, meaning you should look for its most defining or hallmark feature.
Recall the classic presentation of GBS. The key feature taught in nursing is the 'ground-to-brain' or ascending pattern of paralysis.
Evaluate the options based on this knowledge. 'Ascending weakness' directly matches the classic description.
Differentiate the other options: 'Tingling' is an early symptom but not the defining motor progression. 'Tremors' and 'Ptosis' are hallmarks of other neurological disorders (Parkinson's and Myasthenia Gravis, respectively).

Concept Tested & Keywords

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E6 Medicine Davidson Principles Practice 24e p. 1160-1162

E6 Nelson Textbook of Pediatrics(2024) — Volume 2 pp. 1707-1709, 1710-1712

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Attempt every question from this paper in a timed mock, then review the full solution for each one.