Search Results - "Zarahn, E"

The Variability of Human, BOLD Hemodynamic Responses by Aguirre, G.K., Zarahn, E., D'Esposito, M.

“…Cerebral hemodynamic responses to brief periods of neural activity are delayed and dispersed in time. The specific shape of these responses is of some…”
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Empirical analyses of BOLD fMRI statistics. I. Spatially unsmoothed data collected under null-hypothesis conditions by Zarahn, E, Aguirre, G K, D'Esposito, M

“…Temporal autocorrelation, spatial coherency, and their effects on voxel-wise parametric statistics were examined in BOLD fMRI null-hypothesis, or "noise,"…”
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Experimental Design and the Relative Sensitivity of BOLD and Perfusion fMRI by Aguirre, G.K., Detre, J.A., Zarahn, E., Alsop, D.C.

“…This paper compares the statistical power of BOLD and arterial spin labeling perfusion fMRI for a variety of experimental designs within and across subjects…”
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An Area within Human Ventral Cortex Sensitive to “Building” Stimuli: Evidence and Implications by Aguirre, Geoffrey K, Zarahn, E, D’Esposito, M

“…Isolated, ventral brain lesions in humans occasionally produce specific impairments in the ability to use landmarks, particularly buildings, for way-finding…”
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Positive Evidence against Human Hippocampal Involvement in Working Memory Maintenance of Familiar Stimuli by Zarahn, Eric, Rakitin, Brian, Abela, Diane, Flynn, Joseph, Stern, Yaakov

“…Subjects (n = 40) performed a delayed item recognition task for visually presented letters with three set sizes (1, 3 or 6 letters). Accuracy was close to…”
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Stochastic Designs in Event-Related fMRI by Friston, K.J., Zarahn, E., Josephs, O., Henson, R.N.A., Dale, A.M.

“…This article considers the efficiency of event-related fMRI designs in terms of the optimum temporal pattern of stimulus or trial presentations. The…”
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To Smooth or Not to Smooth?: Bias and Efficiency in fMRI Time-Series Analysis by Friston, K.J., Josephs, O., Zarahn, E., Holmes, A.P., Rouquette, S., Poline, J.-B.

“…This paper concerns temporal filtering in fMRI time-series analysis. Whitening serially correlated data is the most efficient approach to parameter estimation…”
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Empirical analyses of BOLD fMRI statistics. II. Spatially smoothed data collected under null-hypothesis and experimental conditions by Aguirre, G K, Zarahn, E, D'Esposito, M

“…In the companion to this paper (E. Zarahn, G. K. Aguirre, and M. D'Esposito, 1997, NeuroImage, 179-197), we describe an implementation of a general linear…”
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The Inferential Impact of Global Signal Covariates in Functional Neuroimaging Analyses by Aguirre, G.K., Zarahn, E., D'Esposito, M.

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The Role of Prefrontal Cortex in Sensory Memory and Motor Preparation: An Event-Related fMRI Study by D'Esposito, M., Ballard, D., Zarahn, E., Aguirre, G.K.

“…Delayed-response tasks are behavioral paradigms in which subjects must remember stimulus attributes across a delay to subsequently perform the appropriate…”
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Functional MRI lateralization of memory in temporal lobe epilepsy by DETRE, J. A, MACCOTTA, L, KING, D, ALSOP, D. C, GLOSSER, G, D'ESPOSITO, M, ZARAHN, E, AGUIRRE, G. K, FRENCH, J. A

“…To determine the feasibility of using functional magnetic resonance imaging (fMRI) to detect asymmetries in the lateralization of memory activation in patients…”
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Functional MRI studies of spatial and nonspatial working memory by D'Esposito, M, Aguirre, G.K, Zarahn, E, Ballard, D, Shin, R.K, Lease, J

“…Single-unit recordings in monkeys have revealed neurons in the lateral prefrontal cortex that increase their firing during a delay between the presentation of…”
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Human Prefrontal Cortex Is Not Specific for Working Memory: A Functional MRI Study by D'Esposito, M., Ballard, D., Aguirre, G.K., Zarahn, E.

“…Lesion studies in monkeys have provided evidence that lateral prefrontal cortex is necessary for working memory, the cognitive processes involved in the…”
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A Reference Effect Approach for Power Analysis in fMRI by Zarahn, E., Slifstein, M.

“…In fMRI, the issues involved in the control of type I error are fairly well understood. In contrast, the control of type II error has received less formal…”
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Spatial localization and resolution of BOLD fMRI by Zarahn, Eric

“…It has been demonstrated that the blood-oxygenation-level-dependent (BOLD) fMRI initial dip allows us to resolve (without differential subtraction) structures…”
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The Effect of Pacing of Experimental Stimuli on Observed Functional MRI Activity by D'Esposito, M., Zarahn, E., Aguirre, G.K., Shin, R.K., Auerbach, P., Detre, J.A.

“…Neuroimaging activation studies typically observe signals during two or more periods of differing cognitive activity which are then analyzed by a subtraction…”
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Angiotensin-induced cyclic GMP production is mediated by multiple receptor subtypes and nitric oxide in N1E-115 neuroblastoma cells by Zarahn, E D, Ye, X, Ades, A M, Reagan, L P, Fluharty, S J

“…Angiotensin II (AngII) elicited a rapid and dose-related production of intracellular cyclic GMP (cGMP) in murine neuroblastoma N1E-115 cells. The…”
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Some Limit Results for Efficiency in Stochastic fMRI Designs by Zarahn, E., Friston, K.J.

“…Functional magnetic resonance imaging (fMRI) provides an indirect measure of neural activity changes in the brain. fMRI designs use a sequence of events (such…”
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An Area within Human Ventral Cortex Sensitive to “Building” Stimuli by Aguirre, Geoffrey K, Zarahn, E, D’Esposito, M

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The Effect of Inter-Stimulus Interval on Signal Response in fMRI by Hutton, C, Howseman, AM, Josephs, O, Zarahn, E, Friston, K, Turner, R

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