Biological Clock

Articles tagged with "Biological Clock".

DLMO: The Gold Standard Test for Measuring Your Circadian Clock Timing

Tags: DLMO, Circadian Timing, Melatonin Onset, Biological Clock

October 22, 2025

What Is the Most Accurate Way to Measure Your Individual Circadian Timing?

Dim Light Melatonin Onset (DLMO) is the gold standard test for measuring individual circadian timing, providing the most reliable indicator of when your biological clock naturally wants to initiate sleep. DLMO measures the precise time when melatonin levels begin to rise in dim light conditions (typically less than 10 lux), revealing your personal circadian phase independent of external factors like bright lights or sleep schedules. This measurement is crucial for diagnosing circadian rhythm disorders and optimizing personalized sleep timing recommendations.

Your Brain's Master Clock: How the Suprachiasmatic Nucleus Controls Circadian Rhythms

Tags: Circadian Rhythms, Suprachiasmatic Nucleus, Biological Clock, Sleep Timing

October 22, 2025

What Controls Your Body’s Internal Clock and Sleep-Wake Cycle?

The suprachiasmatic nucleus (SCN), a tiny cluster of about 20,000 neurons in your brain’s hypothalamus, serves as your body’s master circadian clock. This landmark transplantation research definitively proved that the SCN determines circadian period by showing that when researchers transplanted SCN tissue from one animal to another, the recipient adopted the donor’s circadian rhythm pattern. This small but mighty brain region coordinates all biological rhythms throughout your body, from sleep-wake cycles to hormone release and body temperature fluctuations.