Which sign indicates decreased muscle tone?

• A. Involuntary oscillatory movement resulting from alternate contractions of muscle groups
• B. Decrease muscle tone
• C. Rhythmic, quick oscillatory eye movements
• D. Loss of ability to coordinate muscles together for complex movements

Answer: (B)

The sign being described is hypotonia, which means a reduced amount of muscle tone. When muscle tone is decreased, muscles offer less resistance to being passively moved, so limbs feel unusually floppy. The option that directly states a decrease in muscle tone matches this concept exactly, making it the best choice. The other descriptions point to different neuromuscular signs—tremor (involuntary oscillatory movement), nystagmus (rhythmic eye movements), and ataxia (loss of coordinated movement)—which are not about reduced muscle tone.