Featured Research

from universities, journals, and other organizations

Study Reveals Cause Of Loss Of Consciousness During Seizures

Date:
April 26, 2004
Source:
Yale University
Summary:
Even small epileptic seizures can trigger widespread abnormal signals in brain networks leading to loss of consciousness, according to new findings by a Yale researcher.

New Haven, Conn. -- Even small epileptic seizures can trigger widespread abnormal signals in brain networks leading to loss of consciousness, according to new findings by a Yale researcher.

Related Articles


"We've known for a long time that the temporal lobe misfires during seizures," said Hal Blumenfeld, M.D., assistant professor of neurology and neurobiology at Yale School of Medicine and lead author of the study, "but we were amazed to discover that the temporal lobe also causes the rest of the brain to malfunction. That's why patients lose consciousness."

"Loss of consciousness during seizures often causes serious motor vehicle accidents, injuries, and falls in patients with epilepsy," he added. "The hope is that we can interrupt the process and prevent unconsciousness."

Blumenfeld focused his study on patients with seizures in the temporal lobe, the most common form of epilepsy. He and his colleagues used single photon emission computed tomography (SPECT) to view changes in brain activity during seizures. He also analyzed videotapes of patients during seizures to determine how their behavior was related to imaging changes.

The study found that in patients who lost consciousness during seizures, there were abnormal signals scattered across brain images like a fireworks display. In contrast, patients who had seizures but did not lose consciousness had localized increases confined to the temporal lobe.

"These results may help us target new treatments, such as brain stimulation, to prevent spread of abnormal activity outside the temporal lobe," Blumenfeld said. "Understanding the network abnormalities leading to loss of consciousness during seizures could also help solve an even more fundamental question -- what is the relationship between normal brain activity and conscious thought?"

The senior author was Susan Spencer, M.D., of Yale. Co-authors included Edward Novotny Jr., M.D., I George Zubal, Kelly McNally, Susan Vanderhill, A. LeBron Paige, Richard Chung, Kathryn David, and Andrew Norden, fromYale; Rik Stokking from the University Medical Center, Rotterdam, and Colin Studholme from the University of California at San Francisco.

###

Citation: Cerebral Cortex, Vol. 14: April 2004


Story Source:

The above story is based on materials provided by Yale University. Note: Materials may be edited for content and length.


Cite This Page:

Yale University. "Study Reveals Cause Of Loss Of Consciousness During Seizures." ScienceDaily. ScienceDaily, 26 April 2004. <www.sciencedaily.com/releases/2004/04/040426055246.htm>.
Yale University. (2004, April 26). Study Reveals Cause Of Loss Of Consciousness During Seizures. ScienceDaily. Retrieved April 19, 2015 from www.sciencedaily.com/releases/2004/04/040426055246.htm
Yale University. "Study Reveals Cause Of Loss Of Consciousness During Seizures." ScienceDaily. www.sciencedaily.com/releases/2004/04/040426055246.htm (accessed April 19, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Sunday, April 19, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Our Love Of Puppy Dog Eyes Explained By Science

Our Love Of Puppy Dog Eyes Explained By Science

Newsy (Apr. 17, 2015) Researchers found a spike in oxytocin occurs in both humans and dogs when they gaze into each other&apos;s eyes. Video provided by Newsy
Powered by NewsLook.com
Dr. Oz Under Fire For 'Quack Treatments' Yet Again

Dr. Oz Under Fire For 'Quack Treatments' Yet Again

Newsy (Apr. 17, 2015) Ten doctors signed a letter urging Columbia University to drop Dr. Oz as vice chair of its department of surgery, saying he plugs "quack" treatments. Video provided by Newsy
Powered by NewsLook.com
Scientists Find Link Between Gestational Diabetes And Autism

Scientists Find Link Between Gestational Diabetes And Autism

Newsy (Apr. 17, 2015) Researchers who analyzed data from over 300,000 kids and their mothers say they&apos;ve found a link between gestational diabetes and autism. Video provided by Newsy
Powered by NewsLook.com
Video Messages Help Reassure Dementia Patients

Video Messages Help Reassure Dementia Patients

AP (Apr. 17, 2015) Family members are prerecording messages as part of a unique pilot program at the Hebrew Home in New York. The videos are trying to help victims of Alzheimer&apos;s disease and other forms of dementia break through the morning fog of forgetfulness. (April 17) 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