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Circadian rhythms

Analysis and Comment (14)

It’s mid-afternoon but your body clock’s telling you it’s the middle of the night. It’s mid-afternoon but your body clock’s telling you it’s the middle of the night. Ed Yourdon

Explainer: what is jet lag and how can you overcome it?

Long flights across many time zones often leave us feeling fatigued, sleepy, irritable and generally out of sorts. And it’s not just because of poor sleep on the plane and dehydration from the altitude…
Big lights not inspiring nature. Big lights not inspiring nature. Seattle Municipal Archives

Dim the lights to restore nature’s body clock

Satellite images of the earth provide a striking picture of our planet during the hours of darkness. From space, the world at night appears as an intricate mass of tiny points of light, clustered into…
Sleeping on the plane is no jet lag cure. Sleeping on the plane is no jet lag cure. Edward Simpson

Mathematicians develop new app to put jet lag to bed

Jet lag is a discomfort many of us will have experienced in the days following a long-haul flight across time zones. Mathematicians in the US may have a jet-lag cure in the form a new app called Entrain…
Adjusting back to standard time is easy for most of us and can happen in one or two days. Adjusting back to standard time is easy for most of us and can happen in one or two days. jamelah e./Flickr

Spring forward, fall back: how daylight saving affects our sleep

Daylight saving time ends this weekend in most states and territories (barring Queensland, Western Australia and the Northern Territory), meaning we’ll turn our clocks back by one hour on Sunday morning…
Good news for those who like a weekend sleep-in: lost sleep can be recovered. Good news for those who like a weekend sleep-in: lost sleep can be recovered. Image from shutterstock.com

Explainer: can you pay off your ‘sleep debt’?

Ever have those moments on weekends or public holidays when you wake at your usual time, then realise there’s no pressing need to get up? If you go back for another couple of hours of shut-eye and use…
If any difference exists at all, it’s imperceptibly small, at less than 0.2°C. If any difference exists at all, it’s imperceptibly small, at less than 0.2°C. Ms Cafe

Monday’s medical myth: men are hotter than women

Holding a body close to you, it’s easy to appreciate the warmth a human body can generate. Humans are “warm-blooded” animals. We’re able to effectively maintain a stable internal temperature, even on cold…
What we tweet, and when we tweet it, gives insight into global mood patterns. What we tweet, and when we tweet it, gives insight into global mood patterns. joelaz

I tweet therefore I am … following our collective mood swings on Twitter

I know my mood over the course of a day and so, it seems, does Twitter. Over the years there’s been a lot of work on mood cycles. Much of it has been based on neurochemicals such as serotonin and dopamine…
Drinking alcohol is a pretty bad sleep aid and may become part of a cycle of decline. Drinking alcohol is a pretty bad sleep aid and may become part of a cycle of decline. kjmatthews

Nightmare nightcap: how drinking affects your sleep quality

Sleeping is normally when our body sticks itself back together. Your breathing and your heart rate slow down, and gradually your body repairs itself, undoing all the damage you’ve done to yourself during…
Human sleeping patterns could be about more than light and dark. Human sleeping patterns could be about more than light and dark. Kristof Borkowski

Sleeping with the fishes: Somalian cavefish shed light on our body clocks

Eyeless fish that have evolved underground, completely isolated from the day-night cycle, may offer clues to how our body clocks work up here on dry land. Authors of a report published today in the online…
Unconscious ups and downs are normal – and pretending otherwise is unhelpful. Unconscious ups and downs are normal – and pretending otherwise is unhelpful. sharmili r

Broken sleep? It’s a rollercoaster ride

Most people believe normal, healthy sleep should be long and uninterrupted from start to finish. Well, guess what? They’re wrong. This erroneous public perception of sleep was apparent in survey studies…
Wake up, it’s a beautiful … oh, shut up, let me be. Wake up, it’s a beautiful … oh, shut up, let me be. mislav m/Flickr

Forget Bob Geldof: this is why you don’t like Mondays

Feeling sluggish? Grouchy even? Difficulties getting out of bed? Mondayitis can happen to the best of us. But rest assured: it’s a phenomenon science can actually explain. In fact, there are a range of…
Late nights and jet-lag see us fighting our body clocks, but can we ever win? Late nights and jet-lag see us fighting our body clocks, but can we ever win? fmgbain/Flickr

Keeping time: how our circadian rhythms drive us

Do we control our body clocks or do those clocks, ticking imperceptibly, control us? It’s the kind of question that keeps sleep scientists awake at night. Rhythms are a good place to start. They are a…

Research and News (2)

Research Briefs (3)