1. Biological rhythms of life
Paderewski International School 1m

2. What the biological rhythms of life are?

3. Biological rhythms of life= BioRhythms

4. Types of BioRhythms

5. Circadian Rhythm

8. Superchiasmatic Nucleus(SCN)
SCN - master clock

9. Melatonin

10. Melatonin
Experiment 1 Experiment 2

11. How Your Brain's “Internal Clock” Works?

12. Infradian rhythms

13. Occur less than once every day ex.
the menstrual cycle
Or as a result of seasonal changes
ex. migration and hibernation
(circannual rhythms).

14. Ultradian rhythms

15. What is the Ultradian rhythm?
An ultradian rhythm is any biological process that displays an endogenous
entrainable oscillation of less than 24 hours. When we use this term we
are referring to the 90-120 minute brain wave frequency cycles that occur
when we are both awake and asleep.

16. Other ultradian cyclings of the body
• Blood circulation
• Blinking
• Pulse
• Hormonal release
• Heart rate
• Thermoregulation
• Urination
• Bowel activity
• Nostril dilation
• Appetite
• Mood states

17. Appetite
Corticotropin-releasing hormone Neuropeptide Y

18. Mood states
• Bipolar disorder cycle
• Four or more mood episodes in one year
• Cycles shorter than 24 hours.

19. Ultradian Shift
• Ultradian (or BRAC) Shift is a name for the phenomena where a person’s ultradian
rhythm shifts forward as they stay awake longer
• get tired after 2.25 – 2.75 hours
• more wild and unpredictable