نتایج جستجو برای: hemodynamic responses

تعداد نتایج: 426676  

Journal: :Magnetic resonance in medicine 1998
K J Friston O Josephs G Rees R Turner

This paper presents an approach to characterizing evoked hemodynamic responses in fMRI based on nonlinear system identification, in particular the use of Volterra series. The approach employed enables one to estimate Volterra kernels that describe the relationship between stimulus presentation and the hemodynamic responses that ensue. Volterra series are essentially high-order extensions of lin...

Journal: :Arteriosclerosis, Thrombosis, and Vascular Biology 2009

Journal: :NeuroImage 2006
Chris Martin John Martindale Jason Berwick John Mayhew

An understanding of the relationship between changes in neural activity and the accompanying hemodynamic response is crucial for accurate interpretation of functional brain imaging data and in particular the blood oxygen level-dependent (BOLD) fMRI signal. Much physiological research investigating this topic uses anesthetized animal preparations, and yet, the effects of anesthesia upon the neur...

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