How pleasant and unpleasant stimuli combine in different brain regions: Odor mixtures

dc.creatorGrabenhorst, F
dc.creatorRolls, ET
dc.creatorMargot, C
dc.creatorda Silva, MAAP
dc.creatorVelazco, MI
dc.date2007
dc.dateDEC 5
dc.date2014-11-14T14:00:31Z
dc.date2015-11-26T16:06:52Z
dc.date2014-11-14T14:00:31Z
dc.date2015-11-26T16:06:52Z
dc.date.accessioned2018-03-28T22:55:40Z
dc.date.available2018-03-28T22:55:40Z
dc.identifierJournal Of Neuroscience. Soc Neuroscience, v. 27, n. 49, n. 13532, n. 13540, 2007.
dc.identifier0270-6474
dc.identifierWOS:000251615900020
dc.identifier10.1523/JNEUROSCI.3337-07.2007
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/68854
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/68854
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/68854
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1266018
dc.descriptionMany affective stimuli are hedonically complex mixtures containing both pleasant and unpleasant components. To investigate whether the brain represents the overall affective value of such complex stimuli, or the affective value of the different components simultaneously, we used functional magnetic resonance imaging to measure brain activations to a pleasant odor (jasmine), an unpleasant odor (indole), and a mixture of the two that was pleasant. In brain regions that represented the pleasantness of the odors such as the medial orbitofrontal cortex (as shown by activations that correlated with the pleasantness ratings), the mixture produced activations of similar magnitude to the pleasant jasmine, but very different from the unpleasant indole. These regions thus emphasize the pleasant aspects of the mixture. In contrast, in regions representing the unpleasantness of odors such as the dorsal anterior cingulate and midorbitofrontal cortex the mixture produced activations that were relatively further from the pleasant component jasmine and closer to the indole. These regions thus emphasize the unpleasant aspects of the mixture. Thus mixtures that are found pleasant can have components that are separately pleasant and unpleasant, and the brain can separately and simultaneously represent the positive and negative hedonic value of a complex affective stimulus that contains both pleasant and unpleasant olfactory components. This type of representation may be important for affective decision making in the brain in that separate representations of different affective components of the same sensory stimulus may provide the inputs for making a decision about whether to choose the stimulus or not.
dc.descriptionO TEXTO COMPLETO DESTE ARTIGO, ESTARÁ DISPONÍVEL À PARTIR DE FEVEREIRO DE 2015.
dc.description27
dc.description49
dc.description13532
dc.description13540
dc.languageen
dc.publisherSoc Neuroscience
dc.publisherWashington
dc.publisherEUA
dc.relationJournal Of Neuroscience
dc.relationJ. Neurosci.
dc.rightsembargo
dc.sourceWeb of Science
dc.subjectemotion
dc.subjectaffect
dc.subjectodor
dc.subjectpleasant mixtures
dc.subjectunpleasant mixtures
dc.subjectdecision making
dc.subjectfMRI
dc.subjecthumans
dc.subjectHuman Olfactory Cortex
dc.subjectNeural Representations
dc.subjectHuman Piriform
dc.subjectPerception
dc.subjectIntensity
dc.subjectValence
dc.subjectHumans
dc.subjectTaste
dc.subjectActivation
dc.subjectPlasticity
dc.titleHow pleasant and unpleasant stimuli combine in different brain regions: Odor mixtures
dc.typeArtículos de revistas


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