Network-Mediated Encoding of Circadian Time: The Suprachiasmatic Nucleus (SCN) from Genes to Neurons to Circuits, and Back

Nov 14, 2014The Journal of neuroscience : the official journal of the Society for Neuroscience

How the brain's internal clock system uses genes, nerve cells, and circuits to keep time

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Abstract

The suprachiasmatic nucleus (SCN) functions as a ∼24 h clock both in living animals and in isolated culture.

  • The transcriptional architecture of circadian clocks is consistent across different species.
  • Mammalian interneuronal mechanisms provide enhanced integration of circadian signals.
  • Recent findings explore how electrical activity and calcium levels within SCN neurons relate to intracellular clocks.
  • Investigations into neuron and glial cell roles reveal their contributions to the encoding of circadian time.
  • Mechanisms at the epigenetic and circuit levels help the SCN convert light signals into daily rhythms.

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