Imaging faster neural dynamics with fast fMRI: A need for updated models of the hemodynamic response

JR Polimeni, LD Lewis - Progress in neurobiology, 2021 - Elsevier
Fast fMRI enables the detection of neural dynamics over timescales of hundreds of
milliseconds, suggesting it may provide a new avenue for studying subsecond neural …

[HTML][HTML] Investigating mechanisms of fast BOLD responses: The effects of stimulus intensity and of spatial heterogeneity of hemodynamics

JE Chen, GH Glover, NE Fultz, BR Rosen, JR Polimeni… - NeuroImage, 2021 - Elsevier
Recent studies have demonstrated that fast fMRI can track neural activity well above the
temporal limit predicted by the canonical hemodynamic response model. While these …

Fast fMRI can detect oscillatory neural activity in humans

LD Lewis, K Setsompop, BR Rosen… - Proceedings of the …, 2016 - National Acad Sciences
Oscillatory neural dynamics play an important role in the coordination of large-scale brain
networks. High-level cognitive processes depend on dynamics evolving over hundreds of …

Stimulus-dependent hemodynamic response timing across the human subcortical-cortical visual pathway identified through high spatiotemporal resolution 7T fMRI

LD Lewis, K Setsompop, BR Rosen, JR Polimeni - NeuroImage, 2018 - Elsevier
Recent developments in fMRI acquisition techniques now enable fast sampling with whole-
brain coverage, suggesting fMRI can be used to track changes in neural activity at …

Hemodynamic nonlinearities affect BOLD fMRI response timing and amplitude

JA de Zwart, P van Gelderen, JM Jansma, M Fukunaga… - Neuroimage, 2009 - Elsevier
The interpretation of functional magnetic resonance imaging (fMRI) studies based on blood
oxygen-level dependent (BOLD) contrast generally relies on the assumption of a linear …

[HTML][HTML] Model-based physiological noise removal in fast fMRI

U Agrawal, EN Brown, LD Lewis - Neuroimage, 2020 - Elsevier
Recent improvements in the speed and sensitivity of fMRI acquisition techniques suggest
that fast fMRI can be used to detect and precisely localize sub-second neural dynamics. This …

Distinct structure of cortical population activity on fast and infraslow timescales

M Okun, NA Steinmetz, A Lak, M Dervinis… - Cerebral …, 2019 - academic.oup.com
Cortical activity is organized across multiple spatial and temporal scales. Most research on
the dynamics of neuronal spiking is concerned with timescales of 1 ms–1 s, and little is …

The story of the initial dip in fMRI

X Hu, E Yacoub - Neuroimage, 2012 - Elsevier
Over the past 20years much attention has been given to characterizing the spatial accuracy
of fMRI based signals and to techniques that improve on its co-localization with neuronal …

Technical aspects and utility of fMRI using BOLD and ASL

JA Detre, J Wang - Clinical Neurophysiology, 2002 - Elsevier
Functional magnetic resonance imaging (fMRI) is an emerging methodology which provides
various approaches to visualizing regional brain activity non-invasively. Although the exact …

Investigating neural–hemodynamic coupling and the hemodynamic response function in the awake rat

C Martin, J Martindale, J Berwick, J Mayhew - Neuroimage, 2006 - Elsevier
An understanding of the relationship between changes in neural activity and the
accompanying hemodynamic response is crucial for accurate interpretation of functional …