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Selective Tuning for Contrast in Macaque Area V4
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| Zeitschriftentitel: | The Journal of Neuroscience |
|---|---|
| Personen und Körperschaften: | , , , , |
| In: | The Journal of Neuroscience, 33, 2013, 47, S. 18583-18596 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Society for Neuroscience
|
| Schlagwörter: |
| author_facet |
Sani, Ilaria Santandrea, Elisa Golzar, Ashkan Morrone, Maria Concetta Chelazzi, Leonardo Sani, Ilaria Santandrea, Elisa Golzar, Ashkan Morrone, Maria Concetta Chelazzi, Leonardo |
|---|---|
| author |
Sani, Ilaria Santandrea, Elisa Golzar, Ashkan Morrone, Maria Concetta Chelazzi, Leonardo |
| spellingShingle |
Sani, Ilaria Santandrea, Elisa Golzar, Ashkan Morrone, Maria Concetta Chelazzi, Leonardo The Journal of Neuroscience Selective Tuning for Contrast in Macaque Area V4 General Neuroscience |
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sani, ilaria |
| spelling |
Sani, Ilaria Santandrea, Elisa Golzar, Ashkan Morrone, Maria Concetta Chelazzi, Leonardo 0270-6474 1529-2401 Society for Neuroscience General Neuroscience http://dx.doi.org/10.1523/jneurosci.3465-13.2013 <jats:p>Visually responsive neurons typically exhibit a monotonic-saturating increase of firing with luminance contrast of the stimulus and are able to adapt to the current spatiotemporal context by shifting their selectivity, therefore being perfectly suited for optimal contrast encoding and discrimination. Here we report the first evidence of the existence of neurons showing selective tuning for contrast in area V4d of the behaving macaque (<jats:italic>Macaca mulatta</jats:italic>), i.e., narrow bandpass filter neurons with peak activity encompassing the whole range of visible contrasts and pronounced attenuation at contrasts higher than the peak. Crucially, we found that contrast tuning emerges after a considerable delay from stimulus onset, likely reflecting the contribution of inhibitory mechanisms. Selective tuning for luminance contrast might support multiple functions, including contrast identification and the attentive selection of low contrast stimuli.</jats:p> Selective Tuning for Contrast in Macaque Area V4 The Journal of Neuroscience |
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| title |
Selective Tuning for Contrast in Macaque Area V4 |
| title_unstemmed |
Selective Tuning for Contrast in Macaque Area V4 |
| title_full |
Selective Tuning for Contrast in Macaque Area V4 |
| title_fullStr |
Selective Tuning for Contrast in Macaque Area V4 |
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Selective Tuning for Contrast in Macaque Area V4 |
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Selective Tuning for Contrast in Macaque Area V4 |
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selective tuning for contrast in macaque area v4 |
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General Neuroscience |
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http://dx.doi.org/10.1523/jneurosci.3465-13.2013 |
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2013 |
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18583-18596 |
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<jats:p>Visually responsive neurons typically exhibit a monotonic-saturating increase of firing with luminance contrast of the stimulus and are able to adapt to the current spatiotemporal context by shifting their selectivity, therefore being perfectly suited for optimal contrast encoding and discrimination. Here we report the first evidence of the existence of neurons showing selective tuning for contrast in area V4d of the behaving macaque (<jats:italic>Macaca mulatta</jats:italic>), i.e., narrow bandpass filter neurons with peak activity encompassing the whole range of visible contrasts and pronounced attenuation at contrasts higher than the peak. Crucially, we found that contrast tuning emerges after a considerable delay from stimulus onset, likely reflecting the contribution of inhibitory mechanisms. Selective tuning for luminance contrast might support multiple functions, including contrast identification and the attentive selection of low contrast stimuli.</jats:p> |
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| author | Sani, Ilaria, Santandrea, Elisa, Golzar, Ashkan, Morrone, Maria Concetta, Chelazzi, Leonardo |
| author_facet | Sani, Ilaria, Santandrea, Elisa, Golzar, Ashkan, Morrone, Maria Concetta, Chelazzi, Leonardo, Sani, Ilaria, Santandrea, Elisa, Golzar, Ashkan, Morrone, Maria Concetta, Chelazzi, Leonardo |
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| description | <jats:p>Visually responsive neurons typically exhibit a monotonic-saturating increase of firing with luminance contrast of the stimulus and are able to adapt to the current spatiotemporal context by shifting their selectivity, therefore being perfectly suited for optimal contrast encoding and discrimination. Here we report the first evidence of the existence of neurons showing selective tuning for contrast in area V4d of the behaving macaque (<jats:italic>Macaca mulatta</jats:italic>), i.e., narrow bandpass filter neurons with peak activity encompassing the whole range of visible contrasts and pronounced attenuation at contrasts higher than the peak. Crucially, we found that contrast tuning emerges after a considerable delay from stimulus onset, likely reflecting the contribution of inhibitory mechanisms. Selective tuning for luminance contrast might support multiple functions, including contrast identification and the attentive selection of low contrast stimuli.</jats:p> |
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| spelling | Sani, Ilaria Santandrea, Elisa Golzar, Ashkan Morrone, Maria Concetta Chelazzi, Leonardo 0270-6474 1529-2401 Society for Neuroscience General Neuroscience http://dx.doi.org/10.1523/jneurosci.3465-13.2013 <jats:p>Visually responsive neurons typically exhibit a monotonic-saturating increase of firing with luminance contrast of the stimulus and are able to adapt to the current spatiotemporal context by shifting their selectivity, therefore being perfectly suited for optimal contrast encoding and discrimination. Here we report the first evidence of the existence of neurons showing selective tuning for contrast in area V4d of the behaving macaque (<jats:italic>Macaca mulatta</jats:italic>), i.e., narrow bandpass filter neurons with peak activity encompassing the whole range of visible contrasts and pronounced attenuation at contrasts higher than the peak. Crucially, we found that contrast tuning emerges after a considerable delay from stimulus onset, likely reflecting the contribution of inhibitory mechanisms. Selective tuning for luminance contrast might support multiple functions, including contrast identification and the attentive selection of low contrast stimuli.</jats:p> Selective Tuning for Contrast in Macaque Area V4 The Journal of Neuroscience |
| spellingShingle | Sani, Ilaria, Santandrea, Elisa, Golzar, Ashkan, Morrone, Maria Concetta, Chelazzi, Leonardo, The Journal of Neuroscience, Selective Tuning for Contrast in Macaque Area V4, General Neuroscience |
| title | Selective Tuning for Contrast in Macaque Area V4 |
| title_full | Selective Tuning for Contrast in Macaque Area V4 |
| title_fullStr | Selective Tuning for Contrast in Macaque Area V4 |
| title_full_unstemmed | Selective Tuning for Contrast in Macaque Area V4 |
| title_short | Selective Tuning for Contrast in Macaque Area V4 |
| title_sort | selective tuning for contrast in macaque area v4 |
| title_unstemmed | Selective Tuning for Contrast in Macaque Area V4 |
| topic | General Neuroscience |
| url | http://dx.doi.org/10.1523/jneurosci.3465-13.2013 |