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The Processing of First- and Second-Order Motion in Human Visual Cortex Assessed by Functional Magnetic Resonance Imaging (fMRI)
We have examined the activity levels produced in various areas of the human occipital cortex in response to various motion stimuli using functional magnetic resonance imaging (fMRI) methods. InExpand
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Estimating receptive field size from fMRI data in human striate and extrastriate visual cortex.
Functional magnetic resonance imaging (fMRI) was used to estimate the average receptive field sizes of neurons in each of several striate and extrastriate visual areas of the human cerebral cortex.Expand
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Stimulus-specific mechanisms of visual short-term memory
The retention of spatial information in visual short-term memory was assessed by measuring spatial frequency discrimination thresholds with a two-interval forced-choice task varying the time intervalExpand
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The Relationship between Brain Oscillations and BOLD Signal during Memory Formation: A Combined EEG–fMRI Study
Previous studies demonstrated that increases in the theta frequency band with concomitant decreases in the alpha/beta frequency band indicate successful memory formation. However, little is knownExpand
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Neural correlates of visually induced self-motion illusion in depth.
Optic-flow fields can induce the conscious illusion of self-motion in a stationary observer. Here we used functional magnetic resonance imaging to reveal the differential processing of self- andExpand
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Experimental pain thresholds and plasma beta-endorphin levels during exercise.
Experimental pain thresholds (electrical intracutaneous finger and dental pulp stimulation) and plasma hormone levels (beta-endorphin, cortisol, and catecholamines) were measured in ten healthyExpand
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Prestimulus Oscillatory Phase at 7 Hz Gates Cortical Information Flow and Visual Perception
Although we have the impression that visual information flows continuously from our sensory channels, recent studies indicate that this is likely not the case. Rather, we sample visual stimuliExpand
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Spatiotemporal Frequency and Direction Sensitivities of Human Visual Areas Measured Using fMRI
Using functional magnetic resonance imaging (fMRI) we have studied the variation in response magnitude, in each visual area (V1-V5), as a function of spatial frequency (SF), temporal frequency (TF)Expand
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The psychophysics of perceptual memory
Abstract Psychophysical studies of short-term memory for attributes or dimensions of the visual stimulus known to be important in early visual processing – spatial frequency, orientation, contrast,Expand
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The time course of adaptation to spatial contrast
We explored the buildup and decay of threshold elevation during and after adaptation to sinewave gratings in a series of experiments investigating the effects of adapting time, adapting contrast,Expand
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