Responses of primate visual cortical V4 neurons to simultaneously presented stimuli. Gawne, T. J & Martin, J. M J Neurophysiol, 88(3):1128-35, 2002.
abstract   bibtex   
We report here results from 45 primate V4 visual cortical neurons to the preattentive presentations of seven different patterns located in two separate areas of the same receptive field and to combinations of the patterns in the two locations. For many neurons, we could not determine any clear relationship for the responses to two simultaneous stimuli. However, for a substantial fraction of the neurons we found that the firing rate was well modeled as the maximum firing rate of each stimulus presented separately. It has previously been proposed that taking the maximum of the inputs ("MAX" operator) could be a useful operation for neurons in visual cortex, although there has until now been little direct physiological evidence for this hypothesis. Our results here provide direct support for the hypothesis that the MAX operator plays a significant (although certainly not exclusive) role in generating the receptive field properties of visual cortical neurons.
@Article{Gawne2002,
  author   = {Timothy J Gawne and Julie M Martin},
  journal  = {J Neurophysiol},
  title    = {Responses of primate visual cortical {V}4 neurons to simultaneously presented stimuli.},
  year     = {2002},
  number   = {3},
  pages    = {1128-35},
  volume   = {88},
  abstract = {We report here results from 45 primate V4 visual cortical neurons
	to the preattentive presentations of seven different patterns located
	in two separate areas of the same receptive field and to combinations
	of the patterns in the two locations. For many neurons, we could
	not determine any clear relationship for the responses to two simultaneous
	stimuli. However, for a substantial fraction of the neurons we found
	that the firing rate was well modeled as the maximum firing rate
	of each stimulus presented separately. It has previously been proposed
	that taking the maximum of the inputs ("MAX" operator) could be a
	useful operation for neurons in visual cortex, although there has
	until now been little direct physiological evidence for this hypothesis.
	Our results here provide direct support for the hypothesis that the
	MAX operator plays a significant (although certainly not exclusive)
	role in generating the receptive field properties of visual cortical
	neurons.},
  keywords = {Computing Methodologies, Human, Language, Learning, Mental Processes, Models, Theoretical, Stochastic Processes, Support, U.S. Gov't, Non-P.H.S., Cognition, Linguistics, Neural Networks (Computer), Practice (Psychology), Non-U.S. Gov't, Memory, Psychological, Task Performance and Analysis, Time Factors, Visual Perception, Adult, Attention, Discrimination Learning, Female, Male, Short-Term, Mental Recall, Orientation, Pattern Recognition, Visual, Perceptual Masking, Reading, Concept Formation, Form Perception, Animals, Corpus Striatum, Shrews, P.H.S., Visual Cortex, Visual Pathways, Acoustic Stimulation, Auditory Cortex, Auditory Perception, Cochlea, Ear, Gerbillinae, Glycine, Hearing, Neurons, Space Perception, Strychnine, Adolescent, Decision Making, Reaction Time, Astrocytoma, Brain Mapping, Brain Neoplasms, Cerebral Cortex, Electric Stimulation, Electrophysiology, Epilepsy, Temporal Lobe, Evoked Potentials, Frontal Lobe, Noise, Parietal Lobe, Scalp, Child, Language Development, Psycholinguistics, Brain, Perception, Speech, Vocalization, Animal, Discrimination (Psychology), Hippocampus, Rats, Calcium, Chelating Agents, Excitatory Postsynaptic Potentials, Glutamic Acid, Guanosine Diphosphate, In Vitro, Neuronal Plasticity, Pyramidal Cells, Receptors, AMPA, Metabotropic Glutamate, N-Methyl-D-Aspartate, Somatosensory Cortex, Synapses, Synaptic Transmission, Thionucleotides, Action Potentials, Calcium Channels, L-Type, Electric Conductivity, Entorhinal Cortex, Neurological, Long-Evans, Infant, Mathematics, Statistics, Probability Learning, Problem Solving, Psychophysics, Association Learning, Child Psychology, Habituation (Psychophysiology), Probability Theory, Analysis of Variance, Semantics, Symbolism, Behavior, Eye Movements, Macaca mulatta, Prefrontal Cortex, Cats, Dogs, Haplorhini, Photic Stimulation, Electroencephalography, Nervous System Physiology, Darkness, Grasshoppers, Light, Membrane Potentials, Neural Inhibition, Afferent, Picrotoxin, Vision, 12205134},
}

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