Body’s internal clocks staying in sync with the main brain clock

Circadian oscillators exist in nearly all mammalian cells, influencing physiology and behavior.

• Mammalian cells are synchronized to external environmental cues through hierarchical circadian clocks.
• The suprachiasmatic nucleus in the hypothalamus acts as the 'master clock' receiving light signals.
• Timing information from the master clock is relayed to peripheral tissues, which contain 'slave' clocks.
• Research indicates both similarities and differences in the functioning of central and peripheral circadian clocks.
• This parallelism offers an opportunity to study regulatory mechanisms at the cellular level that impact complex behaviors.

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