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Analysis of fMRI Time-Series Revisited
The approach is predicated on an extension of the general linear model that allows for correlations between error terms due to physiological noise or correlations that ensue after temporal smoothing, and uses the effective degrees of freedom associated with the error term.
Dynamic magnetic resonance imaging of human brain activity during primary sensory stimulation.
- K. Kwong, J. Belliveau, R. Turner
- Biology, MedicineProceedings of the National Academy of Sciences…
- 15 June 1992
Neuronal activity causes local changes in cerebral blood flow, blood volume, and blood oxygenation. Magnetic resonance imaging (MRI) techniques sensitive to changes in cerebral blood flow and blood…
Event-Related fMRI: Characterizing Differential Responses
This paper focuses on bilateral ventrolateral prefrontal responses that show deactivations for previously seen words and activations for novel words in functional magnetic resonance imaging that are evoked by different sorts of stimuli.
Analysis of functional MRI time‐series
A method for detecting significant and regionally specific correlations between sensory input and the brain's physiological response, as measured with functional magnetic resonance imaging (MRI), is…
A Method for Removing Imaging Artifact from Continuous EEG Recorded during Functional MRI
It is demonstrated that simultaneous EEG/ fMRI studies are for the first time possible, extending the scope of EEG/fMRI studies considerably.
Movement‐Related effects in fMRI time‐series
- Karl J. Friston, S. Williams, R. Howard, R. Frackowiak, R. Turner
- PsychologyMagnetic resonance in medicine
- 1 March 1996
The empirical analyses suggest that (in extreme situations) over 90% of fMRI signal can be attributed to movement, and that this artifactual component can be successfully removed.
Functional MRI evidence for adult motor cortex plasticity during motor skill learning
- A. Kami, G. Meyer, P. Jezzard, M. Adams, R. Turner, Leslie G. Ungerleider
- Biology, PsychologyNature
- 14 September 1995
A slowly evolving, long-term, experience-dependent reorganization of the adult Ml is suggested, which may underlie the acquisition and retention of the motor skill.
Nonlinear Responses in fMRI: The Balloon Model, Volterra Kernels, and Other Hemodynamics
The full hemodynamic model is presented, how its associated Volterra kernels can be derived, and the model's validity in relation to empirical nonlinear characterizations of evoked responses in fMRI and other neurophysiological constraints are addressed.
White matter integrity, fiber count, and other fallacies: The do's and don'ts of diffusion MRI
The acquisition of skilled motor performance: fast and slow experience-driven changes in primary motor cortex.
- A. Karni, G. Meyer, Leslie G. Ungerleider
- Psychology, BiologyProceedings of the National Academy of Sciences…
- 3 February 1998
It is shown that a few minutes of daily practice on a sequential finger opposition task can be sufficient to trigger performance gains that require time to become evident, and proposed that skilled motor performance is acquired in several stages: "fast" learning, an initial, within-session improvement phase, followed by a period of consolidation of several hours duration, and then "slow" learnings, consisting of delayed, incremental gains in performance emerging after continued practice.