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circadian pacemaker |
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circadian pacemaker A cluster of neurons, the activity of which fluctuates in ± 24 hr cycles; the CP resides in the pineal gland, weighs 100-180 mg, and derives embryologically from the ependyma at the roof of the 3rd
ventricle; the CP influences the pineal gland, which produces melatonin at night. See Bright light therapy, Chronotherapy, Circadian rhythm, Melatonin, Seasonal affective disorder, Zeitgeber. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The hypothalamic SCN is the master circadian pacemaker in mammals, driving circadian rhythms in behavior, physiology, endocrinology, and metabolism (Ko and Takahashi 2006; Moore and Leak 2001). In mammals, the suprachiasmatic nucleus (SCN) of the hypothalamus is a dominant circadian pacemaker that drives daily rhythms in behavior and physiology (14). This meant that their circadian pacemaker still responded to light although consciously they could perceive no light. |
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