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Search Results to John H.R. Maunsell

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One or more keywords matched the following properties of Maunsell, John H.R.

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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 Depth Perception
Concept Motion Perception
Concept Visual Perception
Concept Time Perception
Concept Perception
Concept Space Perception
Concept Color Perception
Concept Form Perception
Academic Article Macaque vision after magnocellular lateral geniculate lesions.
Academic Article Representation of three-dimensional visual space in the cerebral cortex.
Academic Article Functional properties of neurons in middle temporal visual area of the macaque monkey. II. Binocular interactions and sensitivity to binocular disparity.
Academic Article Functional properties of neurons in middle temporal visual area of the macaque monkey. I. Selectivity for stimulus direction, speed, and orientation.
Academic Article Psychophysical measurement of contrast sensitivity in the behaving mouse.
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 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 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 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 Does primate motion perception depend on the magnocellular pathway?
Academic Article Visual processing in monkey extrastriate cortex.
Academic Article Ventral posterior visual area of the macaque: visual topography and areal boundaries.
Academic Article Functions of the ON and OFF channels of the visual system.
Academic Article The middle temporal visual area in the macaque: myeloarchitecture, connections, functional properties and topographic organization.
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 Perceiving electrical stimulation of identified human visual areas.
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 role of attention in visual processing.
Academic Article Attention to both space and feature modulates neuronal responses in macaque area V4.
Academic Article Shape selectivity in primate lateral intraparietal cortex.
Academic Article On the relationship between synaptic input and spike output jitter in individual neurons.
Academic Article Responses of neurons in the parietal and temporal visual pathways during a motion task.
Academic Article Visual response latencies in striate cortex 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 Insights into cortical mechanisms of behavior from microstimulation experiments.
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 Anterior inferotemporal neurons of monkeys engaged in object recognition can be highly sensitive to object retinal position.
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 Neuronal correlates of inferred motion in primate posterior parietal cortex.
Academic Article Functional visual streams.
Academic Article Extraretinal representations in area V4 in the macaque monkey.
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 Different Inhibitory Interneuron Cell Classes Make Distinct Contributions to Visual Contrast Perception.
Academic Article Neuronal Effects of Spatial and Feature Attention Differ Due to Normalization.
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.

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