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One or more keywords matched the following properties of Maunsell, John H.R.
overview Our research is aimed at understanding how neuronal signals in visual cerebral cortex generate perceptions and guide behavior. Our approach is to record from individual neurons in trained, behaving monkeys and mice while they perform visual tasks. Much of our work is directed at understanding how paying attention to specific visual targets affects the way that they are represented in the brain, and how changes in the sensory representation caused by attention relate to changes in perception and behavior. We have shown that attention increases the strength of neuronal responses without changing their selectivity, effectively representing the attended stimulus as if it were more intense than it really is. Paired measurements of neuronal responses and behavioral performance have shown that much of the behavioral advantage conferred by attention may be explained by this change it causes in the sensory representation, rather than decision processes. Another line of research has been exploring the more general question of how the activity of given neurons contributes to specific visual behaviors. Measurements of the trial-to-trial correlation between the strength of a neuron's responses to a weak stimulus and the animal's performance detecting that stimulus have shown that different neurons contribute to a greater or lesser degree to particular behaviors depending on which stimuli they are most sensitive to. We also use electrical and optical microstimulation to explore how different regions in visual cortex contribute to visual perceptions. By measuring the stimulus strength needed to produce a just-detectable stimulus in different cortical areas, we have found that all regions of cerebral cortex are comparable in their ability to produce detectable percepts.
One or more keywords matched the following items that are connected to Maunsell, John H.R.
Item TypeName
Concept Visual Cortex
Academic Article Cortical neural populations can guide behavior by integrating inputs linearly, independent of synchrony.
Academic Article Strength of gamma rhythm depends on normalization.
Academic Article Topographic organization of the middle temporal visual area in the macaque monkey: representational biases and the relationship to callosal connections and myeloarchitectonic boundaries.
Academic Article The effect of frontal eye field and superior colliculus lesions on saccadic latencies in the rhesus monkey.
Academic Article Different origins of gamma rhythm and high-gamma activity in macaque visual cortex.
Academic Article Local cortical function after uncomplicated subdural electrode implantation. Laboratory investigation.
Academic Article Effects of spatial attention on contrast response functions in macaque area V4.
Academic Article Attentional modulation in visual cortex depends on task timing.
Academic Article Specialized representations in visual cortex: a role for binding?
Academic Article Effects of attention on the reliability of individual neurons in monkey visual cortex.
Academic Article The brain's visual world: representation of visual targets in cerebral cortex.
Academic Article Responses in macaque visual area V4 following inactivation of the parvocellular and magnocellular LGN pathways.
Academic Article Magnocellular and parvocellular contributions to the responses of neurons in macaque striate cortex.
Academic Article Using neuronal populations to study the mechanisms underlying spatial and feature attention.
Academic Article Effects of stimulus direction on the correlation between behavior and single units in area MT during a motion detection task.
Academic Article Differences in gamma frequencies across visual cortex restrict their possible use in computation.
Academic Article The effect of attention on neuronal responses to high and low contrast stimuli.
Academic Article Attentional modulation of MT neurons with single or multiple stimuli in their receptive fields.
Academic Article Attention improves performance primarily by reducing interneuronal correlations.
Academic Article Spatial summation can explain the attentional modulation of neuronal responses to multiple stimuli in area V4.
Academic Article Spatial attention and the latency of neuronal responses in macaque area V4.
Academic Article Effects of task difficulty and target likelihood in area V4 of macaque monkeys.
Academic Article Motion processing in macaque V4.
Academic Article Attentional modulation of motion integration of individual neurons in the middle temporal visual area.
Academic Article Attentional modulation of behavioral performance and neuronal responses in middle temporal and ventral intraparietal areas of macaque monkey.
Academic Article Form representation in monkey inferotemporal cortex is virtually unaltered by free viewing.
Academic Article Attentional modulation of visual motion processing in cortical areas MT and MST.
Academic Article Coding of image contrast in central visual pathways of the macaque monkey.
Academic Article State dependent activity in monkey visual cortex. II. Retinal and extraretinal factors in V4.
Academic Article Visual effects of lesions of cortical area V2 in macaques.
Academic Article Spatiotemporal sensitivity following lesions of area 18 in the cat.
Academic Article Mixed parvocellular and magnocellular geniculate signals in visual area V4.
Academic Article Visual processing in monkey extrastriate cortex.
Academic Article The connections of the middle temporal visual area (MT) and their relationship to a cortical hierarchy in the macaque monkey.
Academic Article The middle temporal visual area in the macaque: myeloarchitecture, connections, functional properties and topographic organization.
Academic Article Mouse primary visual cortex is used to detect both orientation and contrast changes.
Academic Article A strong constraint to the joint processing of pairs of cortical signals.
Academic Article When attention wanders: how uncontrolled fluctuations in attention affect performance.
Academic Article Microstimulation reveals limits in detecting different signals from a local cortical region.
Academic Article Computer-controlled electrical stimulation for quantitative mapping of human cortical function.
Academic Article Spatial attention does not strongly modulate neuronal responses in early human visual cortex.
Academic Article Receptive fields in human visual cortex mapped with surface electrodes.
Academic Article The effect of perceptual learning on neuronal responses in monkey visual area V4.
Academic Article Attention to both space and feature modulates neuronal responses in macaque area V4.
Academic Article On the relationship between synaptic input and spike output jitter in individual neurons.
Academic Article Visual response latencies in striate cortex of the macaque monkey.
Academic Article Magnocellular and parvocellular contributions to responses in the middle temporal visual area (MT) of the macaque monkey.
Academic Article Deficits in speed discrimination following lesions of the lateral suprasylvian cortex in the cat.
Academic Article Tuned normalization explains the size of attention modulations.
Academic Article A neuronal population measure of attention predicts behavioral performance on individual trials.
Academic Article Electrical microstimulation thresholds for behavioral detection and saccades in monkey frontal eye fields.
Academic Article Feature-based attention in visual cortex.
Academic Article Dynamics of neuronal responses in macaque MT and VIP during motion detection.
Academic Article Physiological correlates of perceptual learning in monkey V1 and V2.
Academic Article Effects of attention on the processing of motion in macaque middle temporal and medial superior temporal visual cortical areas.
Academic Article Effects of attention on orientation-tuning functions of single neurons in macaque cortical area V4.
Academic Article Sensory modality specificity of neural activity related to memory in visual cortex.
Academic Article How parallel are the primate visual pathways?
Academic Article Extraretinal representations in area V4 in the macaque monkey.
Academic Article The projections from striate cortex (V1) to areas V2 and V3 in the macaque monkey: asymmetries, areal boundaries, and patchy connections.
Academic Article The visual field representation in striate cortex of the macaque monkey: asymmetries, anisotropies, and individual variability.
Academic Article Neuronal Modulations in Visual Cortex Are Associated with Only One of Multiple Components of Attention.
Academic Article A Refined Neuronal Population Measure of Visual Attention.
Academic Article Graded Neuronal Modulations Related to Visual Spatial Attention.
Academic Article Attention operates uniformly throughout the classical receptive field and the surround.
Academic Article Attention-related changes in correlated neuronal activity arise from normalization mechanisms.
Academic Article Electrical Microstimulation of Visual Cerebral Cortex Elevates Psychophysical Detection Thresholds.
Academic Article Attentional Changes in Either Criterion or Sensitivity Are Associated with Robust Modulations in Lateral Prefrontal Cortex.
Academic Article Neuronal Effects of Spatial and Feature Attention Differ Due to Normalization.
Academic Article The Correlation of Neuronal Signals with Behavior at Different Levels of Visual Cortex and Their Relative Reliability for Behavioral Decisions.
Academic Article Mice Preferentially Use Increases in Cerebral Cortex Spiking to Detect Changes in Visual Stimuli.
Academic Article Single trial neuronal activity dynamics of attentional intensity in monkey visual area V4.
Academic Article Perceptual Weighting of V1 Spikes Revealed by Optogenetic White Noise Stimulation.
Academic Article Neuronal correlates of selective attention and effort in visual area V4 are invariant of motivational context.
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  • Visual Cortex