Circadian Rhythm

Circadian rhythm refers to the natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours. It is often referred to as the body's internal clock.

Key Concepts to Understand

• Biological Clock: The internal mechanism that regulates the circadian rhythm. It is influenced by external cues such as light and temperature.
• Sleep-Wake Cycle: The pattern of sleep and wakefulness that is regulated by the circadian rhythm.
• Impact on Physiology: Circadian rhythm influences various physiological processes such as hormone production, body temperature, and metabolism.
• Disruption: Disruptions to the circadian rhythm, such as shift work or jet lag, can have negative effects on health and well-being.

Factors Influencing Circadian Rhythm

The circadian rhythm is influenced by several factors, including:

• Light: Exposure to light, especially natural daylight, plays a crucial role in regulating the circadian rhythm.
• Temperature: Fluctuations in body temperature can also impact the circadian rhythm.
• Hormones: Hormones such as melatonin, cortisol, and growth hormone are involved in regulating the circadian rhythm.

Study Tips

When studying circadian rhythm, consider the following tips:

• Understand the Mechanism: Familiarize yourself with the biological clock and how it interacts with external cues.
• Explore Research: Look into studies that have investigated the effects of circadian rhythm disruptions on health and performance.
• Practical Examples: Consider real-life examples of how circadian rhythm impacts daily activities and functioning.
• Review Case Studies: Examine case studies related to shift work, sleep disorders, or travel-induced circadian disruptions.