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the claim

The human body keeps internal time with a master circadian clock in the suprachiasmatic nucleus of the hypothalamus.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that the human body keeps internal time with a master circadian clock in the suprachiasmatic nucleus of the hypothalamus?

Yes. A review of hypothalamic circadian rhythms states that the master clock is the suprachiasmatic nucleus in the hypothalamus, responsible for synchronizing internal rhythms, and a mammalian circadian biology review likewise names the SCN as the principal circadian pacemaker. Other retrieved studies place the master clock in the SCN but in rodents, quail, or mammals generally rather than humans specifically.

Verdict: SUPPORTED · 5 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 5
Deciphering clock cell network morphology within the biological master clock, suprachiasmatic nucleus: From the perspective of circadian wave dynamics
2022
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Kim, H., Min, C., Jeong, B., & Lee, K. J. (2022). Deciphering clock cell network morphology within the biological master clock, suprachiasmatic nucleus: From the perspective of circadian wave dynamics. doi.org. https://doi.org/10.1371/journal.pcbi.1010213

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More for · 4
Circadian Clock Genes and Photoperiodism: Comprehensive Analysis of Clock Gene Expression in the Mediobasal Hypothalamus, the Suprachiasmatic Nucleus, and the Pineal Gland of Japanese Quail under Various Light Schedules
2003
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Yasuo, S., Watanabe, M., Okabayashi, N., Ebihara, S., & Yoshimura, T. (2003). Circadian Clock Genes and Photoperiodism: Comprehensive Analysis of Clock Gene Expression in the Mediobasal Hypothalamus, the Suprachiasmatic Nucleus, and the Pineal Gland of Japanese Quail under Various Light Schedules. doi.org. https://doi.org/10.1210/en.2003-0435

Circadian Rhythms of the Hypothalamus: From Function to Physiology -
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Circadian Rhythms of the Hypothalamus: From Function to Physiology - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.3390/clockssleep3010012

SUPRACHIASMATIC NUCLEUS-THE CIRCADIAN PACEMAKER CLOCK IN MAMMALIAN BRAIN
2023
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Dalal, D. A. (2023). SUPRACHIASMATIC NUCLEUS-THE CIRCADIAN PACEMAKER CLOCK IN MAMMALIAN BRAIN. doi.org. https://doi.org/10.59094/emsj.v56i5-6.67

Mammalian circadian biology: elucidating genome-wide levels of temporal organization.
2004
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PL, L. & JS, T. (2004). Mammalian circadian biology: elucidating genome-wide levels of temporal organization.. doi.org. https://doi.org/10.1146/annurev.genom.5.061903.175925

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