Brain wave activity associated with circadian preferences

November 3, 2017, University of Helsinki
Credit: CC0 Public Domain

A new study from the University of Helsinki, Finland, shows that individual circadian preference is associated with brain activity patterns during the night.

Sleep spindles are bursts of oscillatory brain visible on an EEG that occur mainly during stage 2 sleep. Sleep spindles are linked for example to sleep maintenance and strengthening of the during sleep.

The study explored the association between individual circadian preference and sleep activity among 170 17-year-old participants, who underwent a sleep EEG monitoring at their home environment.

"We observed a significantly weaker spindle activity among the morning preference group compared to  other groups. The spindle activity also decreased more towards the morning hours," explains the principal investigator, Professor Anu-Katriina Pesonen.  – This might be a potential facilitator underlying earlier circadian rhythm.

The study published in Scientific Reports shows for the first time a link between circadian and sleep maintaining sleep microstructures, indicated by sleep spindle activity.

The research was conducted in Sleep & Mind -research group at the University of Helsinki, Faculty of Medicine.

Explore further: Better sleep, less fear

More information: Ilona Merikanto et al. Circadian preference towards morningness is associated with lower slow sleep spindle amplitude and intensity in adolescents, Scientific Reports (2017). DOI: 10.1038/s41598-017-13846-7

Related Stories

Better sleep, less fear

October 23, 2017
Higher quality sleep patterns are associated with reduced activity in brain regions involved in fear learning, according to a study of young adults published in Journal Neuroscience. The results suggest that baseline sleep ...

New insights into how sleep helps the brain to reorganise itself

October 2, 2017
A study has given new insights into how sleep contributes to brain plasticity – the ability for our brain to change and reorganise itself – and could pave the way for new ways to help people with learning and memory disorders.

Sleep and Alzheimer's disease connection

October 17, 2017
How often do you get a good night's sleep? Centers for Disease Control and Prevention guidelines recommend adults get an average of at least seven hours of sleep a night. Dr. Ronald Petersen, a Mayo Clinic neurologist, says ...

Information processing breakdown in sleep-deprived rats

September 25, 2017
Sleep deprivation may disrupt the brain's ability to integrate information over time, potentially contributing to the decline in cognitive performance observed during extended time awake, suggests a study in rats published ...

Late sleep-wake time preference linked to depression in individuals with diabetes

April 2, 2017
People with type 2 diabetes who are "night owls" and prefer the evening for activity report having more symptoms of depression than those who are early to bed and early to rise, regardless of the quality of their sleep, a ...

Human brain clocks exposed: Effects of circadian clocks and sleep loss vary across brain regions

August 11, 2016
Ever wondered what happens inside your brain when you stay awake for a day, a night and another day, before you finally go to sleep? In a new study published today in the journal Science, a team of researchers from the University ...

Recommended for you

Toxic chemical cocktails: scientists want safety overhaul

July 23, 2018
People and wildlife risk more harm from chemical mixtures than from separate exposure to the same chemicals, mounting scientific evidence shows.

Systematic literature analysis on the effect of genetic factors on nutrition

July 23, 2018
Individualized dietary recommendations based on genetic information are a popular trend. But a team at the Technical University of Munich (TUM) has systematically analyzed scientific articles and determined that there is ...

Secondhand smoke causing thousands of still births in developing countries

July 20, 2018
The study reveals that more than 40% of all pregnant women in Pakistan are exposed to secondhand smoke—causing approximately 17,000 still births in a year.

Eating iron-fortified grain improves students' attention, memory

July 18, 2018
Adolescent students in a rural school in India who consumed an iron-biofortified version of the grain pearl millet exhibited improved attention and memory compared to those who consumed conventional pearl millet, according ...

Sugar improves memory in over-60s, helping them work smarter

July 18, 2018
Sugar improves memory in older adults – and makes them more motivated to perform difficult tasks at full capacity – according to new research by the University of Warwick.

Vaping tied to blood clots—in mice

July 18, 2018
A new study involving mice raises another concern about the danger of e-cigarettes in humans after experiments showed that short-term exposure to the device's vapors appeared to increase the risk of clot formation.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.