What is a common symptom of narcolepsy?

• A. Inability to fall asleep
• B. Vivid night terrors
• C. Sudden muscle weakness accompanying sleep attacks
• D. Persistent insomnia

Answer: (C)

Narcolepsy is a neurological disorder affecting the ability to regulate sleep-wake cycles. One of the hallmark symptoms of narcolepsy is the occurrence of sudden muscle weakness, known as cataplexy, which typically happens in conjunction with intense emotions such as laughter or surprise. This symptom can lead to sudden loss of muscle tone and strength, causing the person to collapse or experience a temporary inability to move, even while fully conscious.

This characteristic distinguishes narcolepsy from other sleep disorders. In contrast, the inability to fall asleep, vivid night terrors, and persistent insomnia are associated with different sleep disorders. People with narcolepsy often experience excessive daytime sleepiness and sudden sleep attacks, which are distinct from these other symptoms and do not directly align with the sleep onset issues highlighted in the incorrect choices. Thus, the significance of sudden muscle weakness as a symptom of narcolepsy highlights the unique challenges faced by individuals with this condition.