Document Detail

Feature-Based Attention Affects Direction-Selective fMRI Adaptation in hMT+
MedLine Citation:
PMID:  22875866     Owner:  NLM     Status:  Publisher    
Functional magnetic resonance adaptation has been successfully used to reveal direction-selective responses in the human motion complex (hMT+). Here, we aimed at further investigating direction-selective as well as position-selective responses of hMT+ by looking at how these responses are affected by feature-based attention. We varied motion direction and position of 2 consecutive random-dot stimuli. Participants had to either attend to the direction or the position of the stimuli in separate runs. We show that direction selectivity in hMT+ as measured by functional magnetic resonance imaging (fMRI) adaptation was strongly influenced by task set. Attending to the motion direction of the stimuli lead to stronger direction-selective fMRI adaptation than attending to their position. Position selectivity, on the other hand, was largely unaffected by attentional focus. Interestingly, the change in the direction-selective adaptation profile across tasks could not be explained by inheritance from earlier areas. The response pattern in the early retinotopic cortex was stable across conditions. In conclusion, our results provide further evidence for the flexible coding of direction information in hMT+ depending on task demands.
Sarah Weigelt; Wolf Singer; Axel Kohler
Related Documents :
9318976 - Locomotion in the abalone haliotis kamtschatkana: pedal morphology and cost of transport
22317656 - Effect of finger interaction on individual finger: index finger.
11196066 - Locality and parsing complexity.
20125686 - Holographic and interferometric viewing screens.
19883176 - Postural stability during visual stimulation and the contribution from the vestibular a...
10197756 - The effectiveness of light on the circadian clock is linked to its emotional value.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-8
Journal Detail:
Title:  Cerebral cortex (New York, N.Y. : 1991)     Volume:  -     ISSN:  1460-2199     ISO Abbreviation:  Cereb. Cortex     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9110718     Medline TA:  Cereb Cortex     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Neurophysiology, Max Planck Institute for Brain Research, Frankfurt am Main D-60528, Germany.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Rethinking the Role of the Middle Longitudinal Fascicle in Language and Auditory Pathways.
Next Document:  A sharp cadherin-6 gene expression boundary in the developing mouse cortical plate demarcates the fu...