Featured Research

from universities, journals, and other organizations

Long memories in brain activity explain streaks in individual behavior

Date:
February 12, 2013
Source:
Helsingin yliopisto (University of Helsinki)
Summary:
Even with a constant task, human performance fluctuates in time-scales from seconds to minutes in a fractal manner. In a recent study a research group found that the individual variability in the brain dynamics as indexed by the neuronal scaling laws predicted the individual behavioral variability and the conscious detection of very weak sensory stimuli. These data indicate that individual neuronal dynamics underlie the individual variability in human cognition and performance. Results may also have a strong impact in understanding the neuronal mechanism of neuropsychiatric diseases in which behavioral dynamics are abnormal.

Even with a constant task, human performance fluctuates in time-scales from seconds to minutes in a fractal manner. In a recent study a Finnish research group found that the individual variability in the brain dynamics as indexed by the neuronal scaling laws predicted the individual behavioral variability and the conscious detection of very weak sensory stimuli. These data indicate that individual neuronal dynamics underlie the individual variability in human cognition and performance. Results may also have a strong impact in understanding the neuronal mechanism of neuropsychiatric diseases in which behavioral dynamics are abnormal.

Related Articles


Human performance in cognitive tasks varies from moment-to-moment so that the similar behavioral performance is clustered into streaks. The neuronal dynamics underlying this behavioral variability has remained unknown.

Similar scale-free and power-law distributed “avalanche dynamics” is observed in many natural systems such as sand piles, earthquakes, gene regulation, and also brain activity. However, the functional significance of the neuronal scale-free behavior has remained unknown. It is also unclear whether it is just epiphenomena without any further significance.

"We investigated whether the individual variability in the scaling-laws governing the detection of auditory and visual stimuli presented in the threshold of detection could be predicted by the variability in the neuronal scaling laws, explains Matias Palva," project leader in the Neuroscience Center of the University of Helsinki, Finland.

The researchers used magneto- and electroencephalography to record non-invasively human brain activity during the task performance. They found that both the behavioral and neuronal dynamics were characterized by scale-free dynamics. Individual variability in the neuronal scaling laws predicted the individual scaling laws in behavioral performance.

"These results suggest that the individual behavioral and psychophysical variability in task performance is largely a result of the inherent variability in the individual neuronal dynamics," says project leader Satu Palva.


Story Source:

The above story is based on materials provided by Helsingin yliopisto (University of Helsinki). Note: Materials may be edited for content and length.


Journal Reference:

  1. J. M. Palva, A. Zhigalov, J. Hirvonen, O. Korhonen, K. Linkenkaer-Hansen, S. Palva. Neuronal long-range temporal correlations and avalanche dynamics are correlated with behavioral scaling laws. Proceedings of the National Academy of Sciences, 2013; DOI: 10.1073/pnas.1216855110

Cite This Page:

Helsingin yliopisto (University of Helsinki). "Long memories in brain activity explain streaks in individual behavior." ScienceDaily. ScienceDaily, 12 February 2013. <www.sciencedaily.com/releases/2013/02/130212075220.htm>.
Helsingin yliopisto (University of Helsinki). (2013, February 12). Long memories in brain activity explain streaks in individual behavior. ScienceDaily. Retrieved February 1, 2015 from www.sciencedaily.com/releases/2013/02/130212075220.htm
Helsingin yliopisto (University of Helsinki). "Long memories in brain activity explain streaks in individual behavior." ScienceDaily. www.sciencedaily.com/releases/2013/02/130212075220.htm (accessed February 1, 2015).

Share This


More From ScienceDaily



More Mind & Brain News

Sunday, February 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

NFL Concussions Down; Still on Parents' Minds

NFL Concussions Down; Still on Parents' Minds

AP (Jan. 30, 2015) The NFL announced this week that the number of game concussions dropped by a quarter over last season. Still, the dangers of the sport still weigh on players, and parents&apos; minds. (Jan. 30) Video provided by AP
Powered by NewsLook.com
Study Shows Newborn Chicks Count From Left to Right Just Like Humans

Study Shows Newborn Chicks Count From Left to Right Just Like Humans

Buzz60 (Jan. 30, 2015) Researchers for the first time identified human&apos;s innate preference for associating low and high numbers with the left and right respectively in another species. Jen Markham (@jenmarkham) explains. Video provided by Buzz60
Powered by NewsLook.com
Best Mood Elevating, Feel Good Shakes & Smoothies

Best Mood Elevating, Feel Good Shakes & Smoothies

Buzz60 (Jan. 30, 2015) You can elevate your mood by having a meal in a glass. Fitness and nutrition expert John Basedow (@JohnBasedow) offers the best &apos;feel good&apos; smoothies and shakes chock full of depression-relieving ingredients...including apples, berries, lemons, cucumbers, papaya, kiwi, spinach, kale, whey protein, matcha, ginger, turmeric and cinnamon. Video provided by Buzz60
Powered by NewsLook.com
Poll Says Firstborn Is Responsible, Youngest Is Funnier

Poll Says Firstborn Is Responsible, Youngest Is Funnier

Newsy (Jan. 30, 2015) According to a poll out of the U.K., eldest siblings feel more responsible and successful than their younger siblings. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins