What is the characteristic symptom of Myasthenia Gravis?

• A. Increased muscle strength
• B. Progressive weakness
• C. Sustained muscle contractions
• D. Improved reflexes

Answer: (B)

The characteristic symptom of Myasthenia Gravis is progressive weakness. This condition is an autoimmune disorder where the body's immune system attacks the communication between nerves and muscles, particularly at the neuromuscular junction. As a result, individuals experience muscle weakness that worsens with activity and improves with rest. This unique pattern of weakness is a hallmark sign of the disease.

In contrast to increased muscle strength, which does not occur in Myasthenia Gravis, the muscles can become significantly weaker after prolonged use. Sustained muscle contractions are not associated with this condition, as the muscle's ability to maintain contraction diminishes over time. Improved reflexes also do not relate to Myasthenia Gravis, as the condition primarily affects voluntary muscle movement rather than reflexes. Understanding the nature of the weakness in this disorder is essential for identifying and managing the symptoms effectively.