Featured Research

from universities, journals, and other organizations

Brain Imaging Links Chronic Insomnia To Reversible Cognitive Deficits Without Changes In Behavior

Date:
September 3, 2008
Source:
American Academy of Sleep Medicine
Summary:
A neuroimaging study has found that cognitive processes related to verbal fluency are compromised in people with insomnia despite the absence of a behavioral deficit. These specific brain function alterations can be reversed, however, through non-pharmacological treatment with sleep therapy.

A neuroimaging study has found that cognitive processes related to verbal fluency are compromised in people with insomnia despite the absence of a behavioral deficit. These specific brain function alterations can be reversed, however, through non-pharmacological treatment with sleep therapy.

Results of functional magnetic resonance imaging (fMRI) scanning during verbal fluency tasks show that people with insomnia have less activation than controls in the left medial prefrontal cortex and the left interior frontal gyrus, two fluency-specific brain regions. However, participants with insomnia generated more words than controls on both the category fluency task (46.4 words compared with 38.7 words) and the letter fluency task (40.1 words compared with 32.7 words).

"It was surprising to see that the patients performed at a higher level than the control group, but showed reduced brain activation in their fMRI results," said principal investigator Ysbrand Der Werf, PhD, of the Netherlands Institute for Neuroscience in Amsterdam. "The success during the task may reflect a conscious effort to counteract the effect of poor sleep."

Results from post-treatment neuroimaging shows that cognitive abnormalities recovered for insomnia patients who received sleep therapy, but not for those assigned to a wait-list group. Participants in the sleep therapy group also generated more words on the verbal fluency tasks after treatment than members of the wait-list group, although the results did not achieve statistical significance.

According to the authors, these results should encourage the use of sleep therapy in clinical practice as a low-cost, non-pharmacological intervention for insomnia.

The study included 21 chronic insomnia patients with an average age of 61 years and 12 healthy controls with an average age of 60 years who were matched for age, sex and education. Insomnia was defined as "chronic" if it had lasted for at least 2.5 years. Participants underwent fMRI scanning during the performance of verbabal fluency tasks between 5 p.m. and 8:30 p.m.

Insomnia patients then were randomly assigned to a six-week long sleep therapy group or a wait-list group. Therapy involved a combination of sleep restriction, multifaceted cognitive-behavior therapy, morning and late afternoon bright-light exposure and body temperature manipulations. After six weeks, fMRI scanning was repeated on both treatment groups during the same verbal fluency tasks.


Story Source:

The above story is based on materials provided by American Academy of Sleep Medicine. Note: Materials may be edited for content and length.


Journal Reference:

  1. Prefontal Hypoactivation and Recovery in Insomnia. Sleep, Sept. 1, 2008

Cite This Page:

American Academy of Sleep Medicine. "Brain Imaging Links Chronic Insomnia To Reversible Cognitive Deficits Without Changes In Behavior." ScienceDaily. ScienceDaily, 3 September 2008. <www.sciencedaily.com/releases/2008/09/080901084845.htm>.
American Academy of Sleep Medicine. (2008, September 3). Brain Imaging Links Chronic Insomnia To Reversible Cognitive Deficits Without Changes In Behavior. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2008/09/080901084845.htm
American Academy of Sleep Medicine. "Brain Imaging Links Chronic Insomnia To Reversible Cognitive Deficits Without Changes In Behavior." ScienceDaily. www.sciencedaily.com/releases/2008/09/080901084845.htm (accessed October 21, 2014).

Share This



More Health & Medicine News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How Nigeria Beat Its Ebola Outbreak

How Nigeria Beat Its Ebola Outbreak

Newsy (Oct. 20, 2014) The World Health Organization has declared Nigeria free of Ebola. Health experts credit a bit of luck and the government's initial response. Video provided by Newsy
Powered by NewsLook.com
Another Study Suggests Viagra Is Good For The Heart

Another Study Suggests Viagra Is Good For The Heart

Newsy (Oct. 20, 2014) An ingredient in erectile-dysfunction medications such as Viagra could improve heart function. Perhaps not surprising, given Viagra's history. Video provided by Newsy
Powered by NewsLook.com
Ebola Worries End for Dozens on U.S. Watch Lists

Ebola Worries End for Dozens on U.S. Watch Lists

Reuters - US Online Video (Oct. 20, 2014) Forty-three people who had contact with Thomas Eric Duncan, the first person diagnosed with Ebola in the U.S., were cleared overnight of twice-daily monitoring after 21 days of showing no symptoms. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
CDC Calls for New Ebola Safety Guidelines

CDC Calls for New Ebola Safety Guidelines

AP (Oct. 20, 2014) Centers for Disease Control and Prevention Director Dr. Tom Frieden laid out new guidelines for health care workers when dealing with the deadly Ebola virus including new precautions when taking off personal protective equipment. (Oct. 20) Video provided by AP
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