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 …
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
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 …
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 …
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
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 …
brain coverage, suggesting fMRI can be used to track changes in neural activity at …
Hemodynamic nonlinearities affect BOLD fMRI response timing and amplitude
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 …
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 …
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
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 dynamics of neuronal spiking is concerned with timescales of 1 ms–1 s, and little is …
Technical aspects and utility of fMRI using BOLD and ASL
Functional magnetic resonance imaging (fMRI) is an emerging methodology which provides
various approaches to visualizing regional brain activity non-invasively. Although the exact …
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
An understanding of the relationship between changes in neural activity and the
accompanying hemodynamic response is crucial for accurate interpretation of functional …
accompanying hemodynamic response is crucial for accurate interpretation of functional …