Attentional modulation strength in cortical area MT depends on stimulus contrast

Attentional modulation strength in cortical area MT depends on stimulus contrast. Martínez-Trujillo, J. & Treue, S. Neuron, 35(2):365--370, July, 2002. PMID: 12160753
abstract bibtex

The attentional modulation of sensory information processing in the visual system is the result of top-down influences, which can cause a multiplicative modulation of the firing rate of sensory neurons in extrastriate visual cortex, an effect reminiscent of the bottom-up effect of changes in stimulus contrast. This similarity could simply reflect the multiplicity of both effects. But, here we show that in direction-selective neurons in monkey visual cortical area MT, stimulus and attentional effects share a nonlinearity. These neurons show higher response gain for both contrast and attentional changes for intermediate contrast stimuli and smaller gain for low- and high-contrast stimuli. This finding suggests a close relationship between the neural encoding of stimulus contrast and the modulating effect of the behavioral relevance of stimuli.

@article{ martinez-trujillo_attentional_2002,
  title = {Attentional modulation strength in cortical area {MT} depends on stimulus contrast},
  volume = {35},
  issn = {0896-6273},
  abstract = {The attentional modulation of sensory information processing in the visual system is the result of top-down influences, which can cause a multiplicative modulation of the firing rate of sensory neurons in extrastriate visual cortex, an effect reminiscent of the bottom-up effect of changes in stimulus contrast. This similarity could simply reflect the multiplicity of both effects. But, here we show that in direction-selective neurons in monkey visual cortical area {MT}, stimulus and attentional effects share a nonlinearity. These neurons show higher response gain for both contrast and attentional changes for intermediate contrast stimuli and smaller gain for low- and high-contrast stimuli. This finding suggests a close relationship between the neural encoding of stimulus contrast and the modulating effect of the behavioral relevance of stimuli.},
  language = {eng},
  number = {2},
  journal = {Neuron},
  author = {Martínez-Trujillo, Julio and Treue, Stefan},
  month = {July},
  year = {2002},
  note = {{PMID:} 12160753},
  keywords = {Action Potentials, Animals, Attention, Contrast Sensitivity, Lighting, Macaca mulatta, Motion Perception, Neurons, Photic Stimulation, Temporal Lobe, Visual Cortex, Visual Fields, Visual Pathways},
  pages = {365--370}
}

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This similarity could simply reflect the multiplicity of both effects. But, here we show that in direction-selective neurons in monkey visual cortical area {MT}, stimulus and attentional effects share a nonlinearity. These neurons show higher response gain for both contrast and attentional changes for intermediate contrast stimuli and smaller gain for low- and high-contrast stimuli. This finding suggests a close relationship between the neural encoding of stimulus contrast and the modulating effect of the behavioral relevance of stimuli.},\n language = {eng},\n number = {2},\n journal = {Neuron},\n author = {Martínez-Trujillo, Julio and Treue, Stefan},\n month = {July},\n year = {2002},\n note = {{PMID:} 12160753},\n keywords = {Action Potentials, Animals, Attention, Contrast Sensitivity, Lighting, Macaca mulatta, Motion Perception, Neurons, Photic Stimulation, Temporal Lobe, Visual Cortex, Visual Fields, Visual Pathways},\n pages = {365--370}\n}</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" id=\"abstract_martinez_trujillo_attentional_2002\"\n style=\"display:none\">\n The attentional modulation of sensory information processing in the visual system is the result of top-down influences, which can cause a multiplicative modulation of the firing rate of sensory neurons in extrastriate visual cortex, an effect reminiscent of the bottom-up effect of changes in stimulus contrast. This similarity could simply reflect the multiplicity of both effects. But, here we show that in direction-selective neurons in monkey visual cortical area MT, stimulus and attentional effects share a nonlinearity. These neurons show higher response gain for both contrast and attentional changes for intermediate contrast stimuli and smaller gain for low- and high-contrast stimuli. This finding suggests a close relationship between the neural encoding of stimulus contrast and the modulating effect of the behavioral relevance of stimuli.\n</div>\n\n\n</div>\n","downloads":0,"bibbaseid":"martneztrujillo-treue-attentionalmodulationstrengthincorticalareamtdependsonstimuluscontrast-2002","role":"author","year":"2002","volume":"35","type":"article","title":"Attentional modulation strength in cortical area MT depends on stimulus contrast","pages":"365--370","number":"2","note":"PMID: 12160753","month":"July","language":"eng","keywords":"Action Potentials, Animals, Attention, Contrast Sensitivity, Lighting, Macaca mulatta, Motion Perception, Neurons, Photic Stimulation, Temporal Lobe, Visual Cortex, Visual Fields, Visual Pathways","key":"martinez-trujillo_attentional_2002","journal":"Neuron","issn":"0896-6273","id":"martinez-trujillo_attentional_2002","bibtype":"article","bibtex":"@article{ martinez-trujillo_attentional_2002,\n title = {Attentional modulation strength in cortical area {MT} depends on stimulus contrast},\n volume = {35},\n issn = {0896-6273},\n abstract = {The attentional modulation of sensory information processing in the visual system is the result of top-down influences, which can cause a multiplicative modulation of the firing rate of sensory neurons in extrastriate visual cortex, an effect reminiscent of the bottom-up effect of changes in stimulus contrast. This similarity could simply reflect the multiplicity of both effects. But, here we show that in direction-selective neurons in monkey visual cortical area {MT}, stimulus and attentional effects share a nonlinearity. These neurons show higher response gain for both contrast and attentional changes for intermediate contrast stimuli and smaller gain for low- and high-contrast stimuli. This finding suggests a close relationship between the neural encoding of stimulus contrast and the modulating effect of the behavioral relevance of stimuli.},\n language = {eng},\n number = {2},\n journal = {Neuron},\n author = {Martínez-Trujillo, Julio and Treue, Stefan},\n month = {July},\n year = {2002},\n note = {{PMID:} 12160753},\n keywords = {Action Potentials, Animals, Attention, Contrast Sensitivity, Lighting, Macaca mulatta, Motion Perception, Neurons, Photic Stimulation, Temporal Lobe, Visual Cortex, Visual Fields, Visual Pathways},\n pages = {365--370}\n}","author_short":["Martínez-Trujillo, J.","Treue, S."],"author":["Martínez-Trujillo, Julio","Treue, Stefan"],"abstract":"The attentional modulation of sensory information processing in the visual system is the result of top-down influences, which can cause a multiplicative modulation of the firing rate of sensory neurons in extrastriate visual cortex, an effect reminiscent of the bottom-up effect of changes in stimulus contrast. 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