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Bodily Rhythms

Bodily Rhythms. Endogenous pacemakers The internal ‘body clocks’ that generate biological rhythms Exogenous zeitgebers External factors that regulate or alter biological rhythms. www.psychlotron.org.uk. Hypothalamus. GnRH. Pituitary Gland. FSH & LH. The Menstrual Cycle. Ovaries & Uterus.

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Bodily Rhythms

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  1. Bodily Rhythms • Endogenous pacemakers • The internal ‘body clocks’ that generate biological rhythms • Exogenous zeitgebers • External factors that regulate or alter biological rhythms www.psychlotron.org.uk

  2. Hypothalamus GnRH Pituitary Gland FSH & LH The Menstrual Cycle Ovaries & Uterus www.psychlotron.org.uk

  3. LH Hormone Levels FSH ovulation The Menstrual Cycle www.psychlotron.org.uk

  4. No birth control Sexual Activity Birth control ovulation The Menstrual Cycle www.psychlotron.org.uk Adams et al (1979)

  5. The Menstrual Cycle • Generated by the hypothalamus • Fluctuations in hormone levels affect: • Internal biology (ovulation, menstruation) • Sexual behaviour (optimal for conception) • Apparently influenced by zeitgebers • Possible pheromonal mechanism • Possible evolutionary advantage www.psychlotron.org.uk

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