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Neuroimaging reveals how brain uses objects to recognize scenes

Date:
September 26, 2011
Source:
Boston College
Summary:
A new study by psychologists helps to explain how people quickly and accurately recognize complicated scenes such as playgrounds, kitchens and traffic intersections.

Scene patterns evoked by actual scenes in one half of scans were compared to predictor patterns derived from object-evoked patterns from the opposite half.
Credit: Image courtesy of Boston College

Research conducted by Boston College neuroscientist Sean MacEvoy and colleague Russell Epstein of the University of Pennsylvania finds evidence of a new way of considering how the brain processes and recognizes a person's surroundings, according to a paper published in the latest issue of Nature Neuroscience.

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For the study, MacEvoy and Epstein used functional magnetic resonance image (fMRI) to help them identify how the brain figures out where it is in the world (scene recognition). Study participants had their brains scanned while they looked at photos of four types of scenes: kitchens, bathrooms, intersections and playgrounds. Separately, the researchers took brain scans while the subjects looked at photos of individual objects particular to those scenes (e.g., refrigerators, bathtubs, cars, and slides).

MacEvoy and Epstein found that they could use the brain patterns produced by objects as keys to decipher the brain patterns produced by scenes, and could "read out" what type of scene a participant was seeing at a given point in time. Neuroscientists typically link the brain area involved, known as the lateral occipital complex, to object recognition.

"While previous research on scene recognition has emphasized the role of the three-dimensional layout of scenes in this process, our results suggest a separate system that utilizes information about the objects in scenes to piece together where we are. While that's a strategy that many of us think we might use, here we have evidence of a brain area that could be responsible for it," explained MacEvoy, an assistant professor in the Boston College Psychology Department and principal investigator of the department's Vision and Cognition Lab, which uses fMRI combined with behavioral methods to understand the neuroscience of visual perception and cognition. "The existence of a second route for scene processing could be helpful in the development of treatment strategies for patients with brain-injuries that impact their ability to recognize where they are, which can be severely debilitating."


Story Source:

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


Journal Reference:

  1. Sean P MacEvoy, Russell A Epstein. Constructing scenes from objects in human occipitotemporal cortex. Nature Neuroscience, 2011; DOI: 10.1038/nn.2903

Cite This Page:

Boston College. "Neuroimaging reveals how brain uses objects to recognize scenes." ScienceDaily. ScienceDaily, 26 September 2011. <www.sciencedaily.com/releases/2011/09/110913172705.htm>.
Boston College. (2011, September 26). Neuroimaging reveals how brain uses objects to recognize scenes. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2011/09/110913172705.htm
Boston College. "Neuroimaging reveals how brain uses objects to recognize scenes." ScienceDaily. www.sciencedaily.com/releases/2011/09/110913172705.htm (accessed December 22, 2014).

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