Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Visual attention attuned to grabbable objects

17.03.2003


Dartmouth research group has found a new and unexpected way our attention can be grabbed – by grabbable objects. Their study, which appears in the March 17 advance online issue of Nature Neuroscience, demonstrates that objects we typically associate with grasping, such as screwdrivers, forks or pens, automatically attract our visual attention, especially if these items are on a person’s right-hand side.



In the brain, there are two primary visual pathways, one for identifying objects (perception) and one to guide your arms and legs based on what you see (action). To better understand how these two systems may interact, the Dartmouth team studied whether visual perception, specifically peripheral visual attention, influences motor systems in the brain.

"People have studied peripheral vision and how it helps perception, but nobody really talked about it in terms of helping action," says Todd C. Handy, the lead author and a research assistant professor at the Center for Cognitive Neuroscience at Dartmouth. "There are certain things that we all know attract our attention, like flashing lights and loud noises. Yet, think about how often we grab things without directly looking at them. Now here’s evidence that, to help us do this, grabbable objects can literally grab our attention. There’s a clear association."


The researchers devised a simple test to measure this connection. They asked their subjects to look at a computer screen with two objects: one was something graspable, like a tool, the other was not graspable, like a cloud or a sailboat. After about a second, a set of horizontal bars flashed over one of the pictures. While concentrating in the center of the screen, the subjects were told to indicate whether the bars appeared on the left or right. The researchers determined where attention was focused when the bars flashed by measuring the electrical activity in the brain with an electroencephalogram (EEG).

"When the bars flashed over a graspable object, the EEG response in the visual cortex was more intense," says Handy. "It shows evidence of attention being specifically drawn to those objects. Interestingly, the effect was more profound when the tool was on the right. It suggests that attention is more strongly drawn to grabbable objects when they are on our right."

Handy’s team then used fMRI (functional magnetic resonance imaging), a method that precisely identifies areas of brain activity, to confirm their results. They found that when the tool appeared on the right, the brain’s classic motor areas responded to it. If the tool was on the left, the motor areas weren’t as active. According to Handy, this indicates that when graspable items are on the right, the motor system recognizes that there is something to grab and attention is drawn automatically to that location.

"People had already shown that simply viewing graspable objects activates motor areas in the brain," explains Handy. "What we didn’t know was that graspable items can affect visual attention, and that it matters where these things are in visual space."

The team is now trying to understand whether being right-handed or left-handed influences visual attention and motor activity.

Handy’s co-authors on the paper include Scott T. Grafton, professor of psychological and brain sciences and the Director of the Dartmouth Brain Imaging Center; Neha M. Shroff, Dartmouth alum from the Class of ’02; Sarah Ketay, research assistant; and Michael S. Gazzaniga, Dean of the Faculty of Arts and Sciences at Dartmouth and a professor of psychological and brain sciences.


This study was funded by the National Institutes of Health.

Sue Knapp | EurekAlert!
Further information:
http://www.dartmouth.edu/

More articles from Studies and Analyses:

nachricht WAKE-UP provides new treatment option for stroke patients | International study led by UKE
17.05.2018 | Universitätsklinikum Hamburg-Eppendorf

nachricht First form of therapy for childhood dementia CLN2 developed
25.04.2018 | Universitätsklinikum Hamburg-Eppendorf

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

When corals eat plastics

24.05.2018 | Ecology, The Environment and Conservation

Surgery involving ultrasound energy found to treat high blood pressure

24.05.2018 | Medical Engineering

First chip-scale broadband optical system that can sense molecules in the mid-IR

24.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>