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  Negative BOLD Response Ipsi-lateral to the Visual Stimulus: Origin Is Not Blood Stealing

Shmuel, A., Augath, M., Rounis, E., Logothetis, N., & Smirnakis, S. (2003). Negative BOLD Response Ipsi-lateral to the Visual Stimulus: Origin Is Not Blood Stealing. Poster presented at 9th International Conference on Functional Mapping of the Human Brain (HBM 2003), New York, NY, USA.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-DC61-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-7829-7
Genre: Poster

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 Creators:
Shmuel, A1, 2, Author              
Augath, MA1, 2, Author              
Rounis, E, Author
Logothetis, NK1, 2, Author              
Smirnakis, SM, Author              
Affiliations:
1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: Negative BOLD responses (NBRs) are pervasive in human fMRI experiments, but commonly ignored. The NBR in the human occipital cortex, triggered by stimulating part of the visual-field, is correlated with reductions in cerebral blood flow (CBF) and with decreases in oxygen consumption (Shmuel et al., 2002). The findings from this human study corroborate contributions to the NBR by 1) a significant component of reduction in neuronal activity, and possibly 2) a component of hemodynamic changes independent of the local changes in neuronal activity (e.g. passive reduction in CBF, also termed ’vascular blood steal’, due to increased flow to nearby, more demanding areas). Shmuel et al. (2002) indicated that vascular steal cannot account for NBR ipsi-lateral to a one hemi-field visual stimulus. In an accompanying abstract we show that the NBR in monkey V1 is associated with decreases in neuronal activity.

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 Dates: 2003-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/S1053-8119(05)70003-3
BibTex Citekey: 2405
 Degree: -

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Title: 9th International Conference on Functional Mapping of the Human Brain (HBM 2003)
Place of Event: New York, NY, USA
Start-/End Date: 2003-06-19 - 2003-06-22

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Title: NeuroImage
Source Genre: Journal
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Publ. Info: Orlando, FL : Academic Press
Pages: - Volume / Issue: 19 (2 Supplement) Sequence Number: 309 Start / End Page: e570 - e571 Identifier: ISSN: 1053-8119
CoNE: https://pure.mpg.de/cone/journals/resource/954922650166