PMID: 9438436Jan 23, 1998Paper

Nonlinear event-related responses in fMRI

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
K J FristonR Turner

Abstract

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 linear convolution or "smoothing." These kernels, therefore, represent a nonlinear characterization of the hemodynamic response function that can model the responses to stimuli in different contexts (in this work, different rates of word presentation) and interactions among stimuli. The nonlinear components of the responses were shown to be statistically significant, and the kernel estimates were validated using an independent event-related fMRI experiment. One important manifestation of these nonlinear effects is a modulation of stimulus-specific responses by preceding stimuli that are proximate in time. This means that responses at high-stimulus presentation rates saturate and, in some instances, show an inverted U behavior. This behavior appears to be specific to BOLD effects (as distinct from evoked changes in cerebral blood flow) and ma...Continue Reading

References

Mar 1, 1995·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·R S MenonK Uğurbil
Jul 1, 1994·Brain Research. Cognitive Brain Research·J R BinderJ S Hyde
Aug 1, 1993·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·P A BandettiniJ S Hyde
Mar 1, 1996·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·K J FristonR Turner
Jan 1, 1997·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·R B Buxton, L R Frank
Mar 1, 1995·NeuroImage·K J FristonR Turner
Jun 1, 1995·NeuroImage·K J FristonR S Frackowiak
Sep 1, 1995·NeuroImage·K J Worsley, K J Friston
Aug 1, 1996·NeuroImage·C BüchelK J Friston
Jan 1, 1997·Human Brain Mapping·O JosephsK Friston

❮ Previous
Next ❯

Citations

Sep 30, 1999·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·F Kruggel, D Y von Cramon
Nov 26, 1999·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·S ClareP Morris
Nov 2, 2002·Journal of Magnetic Resonance Imaging : JMRI·Edson AmaroPhilip K McGuire
May 30, 2001·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·J KershawI Kanno
Sep 11, 2001·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·S J GrahamW E McIlroy
Feb 4, 2005·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Dave R M LangersWalter H Backes
Feb 26, 2008·European Archives of Psychiatry and Clinical Neuroscience·Georg Northoff
Dec 13, 2006·Neuropsychology Review·Andrew LeeArgye E Hillis
May 1, 2007·Neuropsychology Review·Gregory G BrownRichard B Buxton
Apr 1, 2013·Psychometrika·Thomas T LiuGregory G Brown
Feb 19, 2004·European Psychiatry : the Journal of the Association of European Psychiatrists·Reinhard HeunWolfgang Grodd
Jan 27, 2004·NeuroImage·Tilo T J KircherPhilip K McGuire
Mar 31, 2004·NeuroImage·Mark W WoolrichStephen M Smith
May 26, 2005·NeuroImage·Rasmus M Birn, Peter A Bandettini
Mar 20, 2002·Neuropsychologia·Mairéad MacSweeneyMichael J Brammer
Sep 23, 2003·Brain Research. Brain Research Reviews·A Salek-HaddadiD R Fish
Nov 6, 2003·Magnetic Resonance Imaging·Gholam-Ali Hossein-ZadehHamid Soltanian-Zadeh
Jan 15, 1999·Magnetic Resonance Imaging·P FranssonJ Frahm
Feb 10, 2000·Brain Research. Cognitive Brain Research·E ZarahnM D'Esposito
Apr 2, 2003·NeuroImage·Andrea MechelliKarl J Friston
Jun 5, 2003·NeuroImage·Ziad S SaadPeter A Bandettini
Jun 5, 2003·NeuroImage·Peter KellmanJozef H Duyn
Jul 26, 2003·NeuroImage·Jane NeumannD Yves von Cramon
Sep 2, 2003·NeuroImage·K J FristonW Penny
Sep 2, 2003·NeuroImage·Pasi I TuunanenRisto A Kauppinen
Oct 7, 2003·NeuroImage·Yingli LuYufeng Zang
Oct 1, 1998·Trends in Cognitive Sciences·K J Friston
Apr 27, 2002·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·John A Detre, Jiongjiong Wang
Oct 8, 2008·Development and Psychopathology·Ruskin H Hunt, Kathleen M Thomas
Sep 26, 2008·Proceedings of the National Academy of Sciences of the United States of America·Thien Thanh Dang-VuPierre Maquet
Mar 14, 1998·Proceedings of the National Academy of Sciences of the United States of America·K J Friston
Jul 9, 2008·Memory·E AntonovaR G Morris
May 28, 2004·Brain : a Journal of Neurology·S AbrahamsP N Leigh
May 27, 2009·Brain : a Journal of Neurology·Mairéad MacSweeneyUsha Goswami
Feb 10, 2011·Brain : a Journal of Neurology·Xavier De TiègePatrick Van Bogaert

❮ Previous
Next ❯

Related Concepts

Related Feeds

Brain Lower Grade Glioma

Low grade gliomas in the brain form from oligodendrocytes and astrocytes and are the slowest-growing glioma in adults. Discover the latest research on these brain tumors here.

Auditory Perception

Auditory perception is the ability to receive and interpret information attained by the ears. Here is the latest research on factors and underlying mechanisms that influence auditory perception.

© 2021 Meta ULC. All rights reserved