Featured Research

from universities, journals, and other organizations

New Brain Neuromarker May Shed Light On Autism And Schizophrenia

Date:
May 15, 2007
Source:
Florida Atlantic University
Summary:
Researchers have been able to identify neural signatures of effective, real-time coordination between people in one of the first studies in the field of social neuroscience to actually record, measure and analyze both behavior and brain activity simultaneously in two interacting humans.

Researchers at Florida Atlantic University used a specially designed dual-EEG in one of the first studies in the field of social neuroscience to record, measure and analyze both behavior and brain activity simultaneously in two interacting humans.
Credit: Image courtesy of Florida Atlantic University

Researchers from Florida Atlantic University (FAU) have been able to identify neural signatures of effective, real-time coordination between people in one of the first studies in the field of social neuroscience to actually record, measure and analyze both behavior and brain activity simultaneously in two interacting humans.

Researchers used a specially designed dual-electroencephalogram (EEG) and the conceptual framework and methods of coordination dynamics in this study, “The Phi Complex as a Neuromarker of Human Social Coordination,” published in the May 8, 2007 Proceedings of the National Academy of Sciences. The research was conducted by Drs. Emmanuelle Tognoli, Julien Lagarde, Gonzalo DeGuzman and J.A. Scott Kelso in The Human Brain and Behavior Laboratory at the Center for Complex Systems and Brain Sciences in the Charles E. Schmidt College of Science at FAU.

Using EEG recordings, Tognoli and colleagues collected the brain activity of two people simultaneously performing continuous finger motion. At first, the two subjects were asked to wag their fingers but were not allowed to see each others’ hands. Then, like the shutter release of a camera, the barrier placed between them was removed so they could see each other as they continued to wag their fingers. When subjects were allowed to see each others’ fingers moving, sometimes they adjusted their own movements and synchronized with each other, and sometimes they did not, behaving independently.

“While many interactions between people rely on mutual information exchange, little is known about how such social processes are integrated in the brain,” said Kelso, the Glenwood and Martha Creech Eminent Scholar in Science and founder of the Center for Complex Systems and Brain Sciences. “What this research suggests is that a unique pattern can be seen in the brains of two people interacting and that these brain activities distinguish independence from cooperation. This new brain rhythm that we have discovered and termed the ‘phi complex’ actually distinguishes when you’re socially interacting and when you’re not.”

Phi is one of a number of brain rhythms that exist in the awake human brain and appears to have a social function. Rhythms or oscillations are the natural language of the brain. They are the signature of the underlying cortical networks and are characterized by their frequency, strength and location. “Phi” operates in the 10 Hz band (10 oscillations per second) and is located above the right centro-parietal cortex. It consists of two components: one favors independent behavior and the other favors interpersonal coordination between people.

“The phi complex is closely tied to the success of the mutual interaction between people and is not merely a consequence of one person imitating the other,” said Tognoli. “Our measure of behavior, the phase or timing relationship between the actions of two people, is important because it characterizes the informational exchange between their brains.”

The success or failure of this information exchange revealed in this new brain rhythm will serve as a stimulus for the scientific community to further investigate the phi complex and its implications for understanding not only normal social cognition, but pathologies of social behavior.

“The ground-breaking research by Dr. Scott Kelso and colleagues leading to the discovery of this new brain rhythm related to human social interactions opens up the potential to now understand how and why we as humans relate to each other the way we do,” said Dr. Larry F. Lemanski, vice president for research at FAU. “Moreover, this exciting new finding may lead to a better understanding of and better diagnostic protocols for various neuropsychiatric disorders.”

The phi complex may prove to be a sensitive probe or neuromarker of neuropsychiatric disorders such as autism and schizophrenia where the inability to have harmonious social interactions is problematic. In addition, this research opens up many new and untapped possibilities to identify the neural mechanisms of real-time social behavior between humans such as leader-follower, male-female and enemy-friend relationships.

“An ever increasing number of mathematicians, physicists and computer scientists in collaboration with neuroscientists are trying to understand how patterns are generated in the human brain and their relation to behavior,” said Dr. Gary Perry, dean of the Charles E. Schmidt College of Science. “This cross-disciplinary interaction at the cutting edge of science has proven very fruitful, and Dr. Kelso and his team are pioneers in this area.”

This research has emerged as a result of continuous research support from the National Institutes of Mental Health (NIMH) over the course of more than 20 years for a project entitled, “Dynamic Patterns in Complex Biological Systems,” awarded to Kelso. This project was further enhanced by the Director’s “Innovations” award, also from the NIMH awarded to Kelso and his team. The U.S. Office of Naval Research contributed funding in the later stages of the project and continues to support their ongoing research. The lead author of the paper, Tognoli, is an expert in cognitive neurophysiology and is a postdoctoral fellow in the Human Brain and Behavior Laboratory at FAU. Lagarde, an expert in motor neuroscience and a former postdoctoral fellow at the Center for three years, is now at the University of Montpellier in France. DeGuzman, a physicist by training, is currently a research associate professor at the Center.

The human brain is a complex system possessing more than a trillion cells, many of which have more than a thousand connections. Out of this enormous complexity, patterns of cognition, emotion and behavior somehow emerge. What laws, principles and mechanisms make this possible? How does the human brain really work? What is its relation to what people do? What happens when the brain does not work, as in the many brain disorders that afflict our society? How do human brains work together? Using new concepts, strategies and methods for investigating complex systems and the latest technologies for imaging the human brain, a team of researchers in the laboratory is unraveling the secrets of how the human brain works and its relationship to mind and behavior.

Human Brain and Behavior Laboratory (HBBL) in the Center for Complex Systems and Brain Sciences at Florida Atlantic University.


Story Source:

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


Cite This Page:

Florida Atlantic University. "New Brain Neuromarker May Shed Light On Autism And Schizophrenia." ScienceDaily. ScienceDaily, 15 May 2007. <www.sciencedaily.com/releases/2007/05/070514150813.htm>.
Florida Atlantic University. (2007, May 15). New Brain Neuromarker May Shed Light On Autism And Schizophrenia. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2007/05/070514150813.htm
Florida Atlantic University. "New Brain Neuromarker May Shed Light On Autism And Schizophrenia." ScienceDaily. www.sciencedaily.com/releases/2007/05/070514150813.htm (accessed July 31, 2014).

Share This




More Mind & Brain News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Dieting At A Young Age Might Lead To Harmful Health Habits

Dieting At A Young Age Might Lead To Harmful Health Habits

Newsy (July 30, 2014) Researchers say women who diet at a young age are at greater risk of developing harmful health habits, including eating disorders and alcohol abuse. Video provided by Newsy
Powered by NewsLook.com
It's Not Just Facebook: OKCupid Experiments With Users Too

It's Not Just Facebook: OKCupid Experiments With Users Too

Newsy (July 29, 2014) If you've been looking for love online, there's a chance somebody has been looking at how you're looking. Video provided by Newsy
Powered by NewsLook.com
How Your Face Can Leave A Good Or Bad First Impression

How Your Face Can Leave A Good Or Bad First Impression

Newsy (July 29, 2014) Researchers have found certain facial features can make us seem more attractive or trustworthy. Video provided by Newsy
Powered by NewsLook.com
Losing Sleep Leaves You Vulnerable To 'False Memories'

Losing Sleep Leaves You Vulnerable To 'False Memories'

Newsy (July 27, 2014) A new study shows sleep deprivation can make it harder for people to remember specific details of an event. 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:
from the past week

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