English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Parietal Cortex Mediates Conscious Perception of Illusory Gestalt

Zaretskaya, N., Anstis, S., & Bartels, A. (2013). Parietal Cortex Mediates Conscious Perception of Illusory Gestalt. Journal of Neuroscience, 33(2), 523-531. doi:10.1523/JNEUROSCI.2905-12.2013.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-B522-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-4881-C
Genre: Journal Article

Files

show Files

Locators

show
hide
Description:
-

Creators

show
hide
 Creators:
Zaretskaya, N1, Author              
Anstis, S, Author
Bartels, A1, Author              
Affiliations:
1Vision and Cognition Laboratory, Centre for Integrative Neuroscience, University of Tübingen ̈bingen, , ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: Grouping local elements into a holistic percept, also known as spatial binding, is crucial for meaningful perception. Previous studies have shown that neurons in early visual areas V1 and V2 can signal complex grouping-related information, such as illusory contours or object-border ownerships. However, relatively little is known about higher-level processes contributing to these signals and mediating global Gestalt perception. We used a novel bistable motion illusion that induced alternating and mutually exclusive vivid conscious experiences of either dynamic illusory contours forming a global Gestalt or moving ungrouped local elements while the visual stimulation remained the same. fMRI in healthy human volunteers revealed that activity fluctuations in two sites of the parietal cortex, the superior parietal lobe and the anterior intraparietal sulcus (aIPS), correlated specifically with the perception of the grouped illusory Gestalt as opposed to perception of ungrouped local elements. We then disturbed activity at these two sites in the same participants using transcranial magnetic stimulation (TMS). TMS over aIPS led to a selective shortening of the duration of the global Gestalt percept, with no effect on that of local elements. The results suggest that aIPS activity is directly involved in the process of spatial binding during effortless viewing in the healthy brain. Conscious perception of global Gestalt is therefore associated with aIPS function, similar to attention and perceptual selection.

Details

show
hide
Language(s):
 Dates: 2013-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1523/JNEUROSCI.2905-12.2013
BibTex Citekey: ZaretskayaAB2012
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Neuroscience
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 33 (2) Sequence Number: - Start / End Page: 523 - 531 Identifier: -