Life Time: The New Science of the Body Clock, and How It Can Revolutionize Your Sleep and Health

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Leon Kreitzman; Russell G. Foster (2009). Seasons of Life: The Biological Rhythms That Enable Living Things to Thrive and Survive. New Haven, Conn: Yale University Press. ISBN 978-0-300-11556-7. {{ cite book}}: CS1 maint: multiple names: authors list ( link)

Social jet lag, a term developed by Till Roenneberg, is what people suffer if they are either living on a Western edge of a time-zone (book doesn't explain what location that is), or from Daylight Savings hours (created by Germans originally to ration coal), or due to social/work demands we sleep irregular hours. It took me a while to wrap my head around this one, and I still have to do some serious thinking to fully understand, but this point seemed pretty important throughout the book so I wrote ot down. NREM sleep is linked with our ability to form memories and problem-solving. We dream in both REM & NREM but it's longer and more intense in REM sleep. Depriving people suffering depression REM sleep can improve their condition short-term, but makes it worse long term. In 1991, Foster and his colleagues provided evidence that rods and cones are not necessary for entrainment of an animal to light. [11] In this experiment, Foster gave light pulses to retinally degenerative mice. These mice were homozygous for the rd allele and were shown to have no rods in their retina. Only a few cones were found to remain in the retina. To study the effects of light entrainment, magnitude of phase shift of locomotor activity was measured. The results showed that both mice with normal retina and mice with degenerate retina showed similar entrainment patterns. Foster hypothesized that circadian photoreception occurs with a small number of cones without an outer layer or that an unrecognised class of photoreceptive cells are present.An investigation of the extraretinal photoreceptors mediating photoperiodic induction in the Japanese quail (Coturnix coturnix japonica) (1978)

The male praying mentis has his head eaten while mating (doesn't stop the act) and then the female eats the rest of him. Poor sod. In his 1953 poem Days, Philip Larkin asks: 'What are days for? Where can we live but days?' He goes on with typical gloomy yet endearing angst: 'Ah, solving that question/Brings the priest and the doctor/In their long coats/Running over the fields.' metabolic syndrome is the medical term for a combination of diabetes, high blood pressure (hypertension) and obesity. As we age we become more morning types and our sleep duration reduces... Even our urine production changes. Ruby, Norman F.; Brennan, Thomas J.; Xie, Xinmin; Cao, Vinh; Franken, Paul; Heller, H. Craig; O'Hara, Bruce F. (13 December 2002). "Role of Melanopsin in Circadian Responses to Light". Science. 298 (5601): 2211–2213. Bibcode: 2002Sci...298.2211R. doi: 10.1126/science.1076701. ISSN 0036-8075. PMID 12481140. S2CID 39565298.the extraordinary effects the time we take our medication can have on our risk of life-threatening conditions, such as strokes Executive function: ability to plan, monitor and then control complex behaviours that achieve specific goals or enable us to complete specific tasks A couple of minor points do differ: Foster suggests use of Tryptophan-containing foods to boost serotonin and melatonin levels, helping both sleep and mood (glass of whole milk before bed? yes please). He also refutes the idea that it is the blue light from our devices that keeps us awake, but rather the whole stimulation effect of playing on a computer (absence of evidence in not evidence of absence). For my part I begrudge Foster for this revelation as it is easier to follow a recommendation if there are multiple reasons for doing so (and now I've lost a reason to not look at my phone before bed, which I'm sure doesn't help). Holistic yet accessible, Professor Foster helps each of us achieve the optimum natural routine with insight into:

https://www.bnc.ox.ac.uk/about-brasenose/news/1322-professor-russell-foster-cbe Professor Russell Foster, Brasenose College Tryptophan an amino acid, may aid sleep as it's a precursor to the neurotransmitter serotonin, the hormone melatonin, and vitamin B3. Full fat milk has Tryptophan. Adolf Hitler was a notorious insomniac, and would finally fall asleep in the early hours of the morning. [He] was fast asleep at the Berghof when the Allies invaded France on D-Day on 6 June 1944. His generals would not send reinforcements to Normandy without [his] permission, and no one dared wake him, so he slept until noon. The delay is thought to have saved many lives and been critical for the Allied invasion"

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In Greek mythology, Hypnos is the God of Sleep. He is the son of Nyx (night) and Erebus (darkness) and his twin brother is Thanatos (death). They live in the underworld (Hades). So even in ancient time sleep has been linked to darkness, death and hell. If you do nothing, you will be auto-enrolled in our premium digital monthly subscription plan and retain complete access for 65 € per month. Ralph, M. R.; Foster, R. G.; Davis, F. C.; Menaker, M. (23 February 1990). "Transplanted suprachiasmatic nucleus determines circadian period". Science. 247 (4945): 975–978. Bibcode: 1990Sci...247..975R. doi: 10.1126/science.2305266. ISSN 0036-8075. PMID 2305266. This isn't the best quote to end on, but science! Actually, something I really liked about this book was how deep it got molecularly. It was really interesting to read about, even if it did take me a few reads to understand it all.