Connection | Profiles RNS

Search Result Details

Back to Search Results

This page shows the details of why an item matched the keywords from your search.

Search Results

Maunsell, John H.R.

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

Property	Value
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.

Property

Value

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 Type	Name
Concept	Acoustic Stimulation
Concept	Memory, Short-Term
Concept	Nervous System Diseases
Concept	Synaptic Transmission
Concept	Photic Stimulation
Concept	Pursuit, Smooth
Concept	Saccades
Concept	Sensation
Concept	Cohort Studies
Concept	Sensory Receptor Cells
Concept	Subdural Space
Concept	Synapses
Concept	United States
Concept	National Library of Medicine (U.S.)
Concept	National Institutes of Health (U.S.)
Concept	Sensory Thresholds
Concept	Signal Processing, Computer-Assisted
Concept	Space Perception
Concept	Stereotaxic Techniques
Concept	Contrast Sensitivity
Concept	Signal Detection, Psychological
Concept	Data Interpretation, Statistical
Concept	Evoked Potentials, Somatosensory
Concept	Somatosensory Cortex
Concept	Spinal Cord
Concept	Superior Colliculi
Academic Article	Unique identifiers for authors.
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	Macaque vision after magnocellular lateral geniculate lesions.
Academic Article	Representation of three-dimensional visual space in the cerebral cortex.
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	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	Network rhythms influence the relationship between spike-triggered local field potential and functional connectivity.
Academic Article	A normalization model of attentional modulation of single unit responses.
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	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	Potential confounds in estimating trial-to-trial correlations between neuronal response and behavior using choice probabilities.
Academic Article	Nine criteria for a measure of scientific output.
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	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	Magnocellular or parvocellular lesions in the lateral geniculate nucleus of monkeys cause minor deficits of smooth pursuit eye movements.
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	Does primate motion perception depend on the magnocellular pathway?
Academic Article	Functions of the ON and OFF channels of the visual system.
Academic Article	Effects of motor unit size on innervation patterns in neonatal mammals.
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	Perceiving electrical stimulation of identified human visual areas.
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	Neuronal representations of cognitive state: reward or attention?
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	Behavioral detection of electrical microstimulation in different cortical visual areas.
Academic Article	Feature-based attention in visual cortex.
Academic Article	Using neuronal latency to determine sensory-motor processing pathways in reaction time tasks.
Academic Article	Anterior inferotemporal neurons of monkeys engaged in object recognition can be highly sensitive to object retinal position.
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	Neuronal correlates of inferred motion in primate posterior parietal cortex.
Academic Article	Functional visual streams.
Academic Article	The effects of parvocellular lateral geniculate lesions on the acuity and contrast sensitivity of macaque monkeys.
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	The neuroscience peer review consortium.
Academic Article	Do gamma oscillations play a role in cerebral cortex?
Academic Article	The NIH Public Access Policy.
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	Neuronal Mechanisms of Visual Attention.
Academic Article	Attention-related changes in correlated neuronal activity arise from normalization mechanisms.
Academic Article	Spatially tuned normalization explains attention modulation variance within neurons.
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	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	Attention can be subdivided into neurobiological components corresponding to distinct behavioral effects.
Academic Article	The Correlation of Neuronal Signals with Behavior at Different Levels of Visual Cortex and Their Relative Reliability for Behavioral Decisions.
Award or Honor Receipt	Outstanding PhD Thesis Award
Award or Honor Receipt	Elected Fellow
Award or Honor Receipt	Astor Visiting Lecturer
Award or Honor Receipt	Elected Fellow
Academic Article	Mice Preferentially Use Increases in Cerebral Cortex Spiking to Detect Changes in Visual Stimuli.
Academic Article	The Mind of a Mouse.
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.
Concept	Spatial Processing
Academic Article	Temporal weighting of cortical and subcortical spikes reveals stimulus dependent differences in their contributions to behavior.
Academic Article	Normalization in mouse primary visual cortex.
Award or Honor Receipt	Member

Search Criteria

National Library of Medicine
U
S