A structure that coordinates daily cycles of activity that are linked to the day-night cycle is suprachiasmatic nucleus (SCN).
The anterior region of the hypothalamus has a bilateral structure called the suprachiasmatic nucleus (SCN). It controls the majority of the body's circadian rhythms and serves as the circadian timing system's main pacemaker.
The SCN gets suggestions from Intrinsically photosensitive retinal ganglion cells (ipRGCs) project through the retino-thalamic tract to neurons in the SCN via glutamatergic synapses, providing the photic input. The circadian clock is synchronised as a result.
Therefore, A structure that coordinates daily cycles of activity that are linked to the day-night cycle is suprachiasmatic nucleus (SCN).
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