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dojat03

M. Dojat, J. Warnking, C. Segebarth. Detection at 1.5 Tesla of sustained negative BOLD signal in the human visual cortex during partial visual field stimulation. In International Society for Magnetic Resonance in Medicine, Toronto, 2003.

Abstract

Sustained negative BOLD responses, in the human visual system, have not been reported at the usual field strengths. Such negative responses are likely due to a decrease of cerebral perfusion in non-stimulated areas adjacent to the activated ones, as a result of reallocation of the cortical blood resources. This reallocation may even affect activated areas, thus inducing signal extinction or negative BOLD signal in areas where positive BOLD responses would be anticipated. In combining partial visual field stimulation experiments and retinotopic mapping experiments at 1.5 T, we show that such negative responses may be detected, following reduced visual field stimulation

Keyword

[ Hrf ]

Contact

M. Dojat
J. M. Warnking
C. Segebarth

BibTex Reference

@InProceedings{dojat03,
   Author = {Dojat, M. and Warnking, J. and Segebarth, C.},
   Title = {Detection at 1.5 Tesla of sustained negative {BOLD} signal in the human visual cortex during partial visual field stimulation},
   BookTitle = {International Society for Magnetic Resonance in Medicine},
   Address = {Toronto},
   Year = {2003}
}

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