Circadian misalignment is defined as a mismatch between what?

Circadian misalignment is defined as a mismatch between what?

• A. Internal clock and environmental cues; shift-work sleep disorder and jet lag
• B. Blood glucose and insulin levels
• C. Breathing pattern and heart rate
• D. Dream content and memory

Answer: (A)

Circadian misalignment is a mismatch between your internal clock and the environmental cues that normally synchronize it, especially the light-dark cycle. Your internal clock runs on a roughly 24-hour rhythm and is reset daily by light exposure. When you shift work hours or travel across time zones, the external environment suggests a different time of day than your internal timing, so sleep is at the wrong times and alertness feels off. This misalignment underlies conditions like shift-work sleep disorder and jet lag. The other options involve metabolic regulation, autonomic physiology, or memory processes, which aren’t what circadian misalignment refers to.

Circadian misalignment is a mismatch between your internal clock and the environmental cues that normally synchronize it, especially the light-dark cycle. Your internal clock runs on a roughly 24-hour rhythm and is reset daily by light exposure. When you shift work hours or travel across time zones, the external environment suggests a different time of day than your internal timing, so sleep is at the wrong times and alertness feels off. This misalignment underlies conditions like shift-work sleep disorder and jet lag. The other options involve metabolic regulation, autonomic physiology, or memory processes, which aren’t what circadian misalignment refers to.