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  Positive and negative BOLD-signals from blood vessels in monkey visual cortex

Goense, J., & Logothetis, N. (2008). Positive and negative BOLD-signals from blood vessels in monkey visual cortex. In 16th Scientific Meeting and Exhibition of the International Society of Magnetic Resonance in Medicine (ISMRM 2008) (pp. 27).

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 Creators:
Goense, JBM1, 2, Author              
Logothetis, NK1, 2, 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, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: High-resolution fMRI can aid in determining to what extent the BOLD signal arises from capillaries or larger vessels. In high-resolution functional activation maps both positive and negative BOLD signals associated with vessels were observed; this was seen for both GE- and SE-BOLD. Because of its higher specificity, the SE-BOLD signal was used to investigate the origin of these vessel signals. The location of the SE-BOLD signal from veins changed when the direction of the gradients was changed. This is in contrast to the peak SE-BOLD occurring in layer IV which arises from capillaries, and was insensitive to gradient reversal.

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 Dates: 2008-05
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: 5485
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Title: 16th Scientific Meeting and Exhibition of the International Society of Magnetic Resonance in Medicine (ISMRM 2008)
Place of Event: Toronto, Canada
Start-/End Date: 2008-05-03 - 2008-05-09

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Title: 16th Scientific Meeting and Exhibition of the International Society of Magnetic Resonance in Medicine (ISMRM 2008)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 153 Start / End Page: 27 Identifier: -