Gamma-band synchronization in visual cortex predicts speed of change detection.
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| Title: | Gamma-band synchronization in visual cortex predicts speed of change detection. |
|---|---|
| Authors: | Womelsdorf, Thilo, Fries, Pascal, Mitra, Partha P., Desimone, Robert |
| Source: | Nature. 2/9/2006, Vol. 439 Issue 7077, p733-736. 4p. 4 Graphs. |
| Subjects: | Neural stem cells, Neurons, Nervous system, Psychophysiology, Conditioned response, Behaviorism (Psychology), Psychology |
| Abstract: | Our capacity to process and respond behaviourally to multiple incoming stimuli is very limited. To optimize the use of this limited capacity, attentional mechanisms give priority to behaviourally relevant stimuli at the expense of irrelevant distractors. In visual areas, attended stimuli induce enhanced responses and an improved synchronization of rhythmic neuronal activity in the gamma frequency band (40–70 Hz). Both effects probably improve the neuronal signalling of attended stimuli within and among brain areas. Attention also results in improved behavioural performance and shortened reaction times. However, it is not known how reaction times are related to either response strength or gamma-band synchronization in visual areas. Here we show that behavioural response times to a stimulus change can be predicted specifically by the degree of gamma-band synchronization among those neurons in monkey visual area V4 that are activated by the behaviourally relevant stimulus. When there are two visual stimuli and monkeys have to detect a change in one stimulus while ignoring the other, their reactions are fastest when the relevant stimulus induces strong gamma-band synchronization before and after the change in stimulus. This enhanced gamma-band synchronization is also followed by shorter neuronal response latencies on the fast trials. Conversely, the monkeys' reactions are slowest when gamma-band synchronization is high in response to the irrelevant distractor. Thus, enhanced neuronal gamma-band synchronization and shortened neuronal response latencies to an attended stimulus seem to have direct effects on visually triggered behaviour, reflecting an early neuronal correlate of efficient visuo-motor integration. [ABSTRACT FROM AUTHOR] |
| Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 19722134 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Gamma-band synchronization in visual cortex predicts speed of change detection. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Womelsdorf%2C+Thilo%22">Womelsdorf, Thilo</searchLink><br /><searchLink fieldCode="AR" term="%22Fries%2C+Pascal%22">Fries, Pascal</searchLink><br /><searchLink fieldCode="AR" term="%22Mitra%2C+Partha+P%2E%22">Mitra, Partha P.</searchLink><br /><searchLink fieldCode="AR" term="%22Desimone%2C+Robert%22">Desimone, Robert</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 2/9/2006, Vol. 439 Issue 7077, p733-736. 4p. 4 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Neural+stem+cells%22">Neural stem cells</searchLink><br /><searchLink fieldCode="DE" term="%22Neurons%22">Neurons</searchLink><br /><searchLink fieldCode="DE" term="%22Nervous+system%22">Nervous system</searchLink><br /><searchLink fieldCode="DE" term="%22Psychophysiology%22">Psychophysiology</searchLink><br /><searchLink fieldCode="DE" term="%22Conditioned+response%22">Conditioned response</searchLink><br /><searchLink fieldCode="DE" term="%22Behaviorism+%28Psychology%29%22">Behaviorism (Psychology)</searchLink><br /><searchLink fieldCode="DE" term="%22Psychology%22">Psychology</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Our capacity to process and respond behaviourally to multiple incoming stimuli is very limited. To optimize the use of this limited capacity, attentional mechanisms give priority to behaviourally relevant stimuli at the expense of irrelevant distractors. In visual areas, attended stimuli induce enhanced responses and an improved synchronization of rhythmic neuronal activity in the gamma frequency band (40–70 Hz). Both effects probably improve the neuronal signalling of attended stimuli within and among brain areas. Attention also results in improved behavioural performance and shortened reaction times. However, it is not known how reaction times are related to either response strength or gamma-band synchronization in visual areas. Here we show that behavioural response times to a stimulus change can be predicted specifically by the degree of gamma-band synchronization among those neurons in monkey visual area V4 that are activated by the behaviourally relevant stimulus. When there are two visual stimuli and monkeys have to detect a change in one stimulus while ignoring the other, their reactions are fastest when the relevant stimulus induces strong gamma-band synchronization before and after the change in stimulus. This enhanced gamma-band synchronization is also followed by shorter neuronal response latencies on the fast trials. Conversely, the monkeys' reactions are slowest when gamma-band synchronization is high in response to the irrelevant distractor. Thus, enhanced neuronal gamma-band synchronization and shortened neuronal response latencies to an attended stimulus seem to have direct effects on visually triggered behaviour, reflecting an early neuronal correlate of efficient visuo-motor integration. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1038/nature04258 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 4 StartPage: 733 Subjects: – SubjectFull: Neural stem cells Type: general – SubjectFull: Neurons Type: general – SubjectFull: Nervous system Type: general – SubjectFull: Psychophysiology Type: general – SubjectFull: Conditioned response Type: general – SubjectFull: Behaviorism (Psychology) Type: general – SubjectFull: Psychology Type: general Titles: – TitleFull: Gamma-band synchronization in visual cortex predicts speed of change detection. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Womelsdorf, Thilo – PersonEntity: Name: NameFull: Fries, Pascal – PersonEntity: Name: NameFull: Mitra, Partha P. – PersonEntity: Name: NameFull: Desimone, Robert IsPartOfRelationships: – BibEntity: Dates: – D: 09 M: 02 Text: 2/9/2006 Type: published Y: 2006 Identifiers: – Type: issn-print Value: 00280836 Numbering: – Type: volume Value: 439 – Type: issue Value: 7077 Titles: – TitleFull: Nature Type: main |
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