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Titolo:
Time course of the subjective emotional response to aversive pictures: relevance to fMRI studies
Autore:
Garrett, AS; Maddock, RJ;
Indirizzi:
Univ Calif Davis, Davis Med Ctr, Dept Psychiat, Sacramento, CA 95817 USA Univ Calif Davis Sacramento CA USA 95817 ychiat, Sacramento, CA 95817 USA
Titolo Testata:
PSYCHIATRY RESEARCH-NEUROIMAGING
fascicolo: 1, volume: 108, anno: 2001,
pagine: 39 - 48
SICI:
0925-4927(20011105)108:1<39:TCOTSE>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN AMYGDALA; ACTIVATION; MOOD; PET; EXPRESSIONS; ATTENTION; STIMULI; DISGUST;
Keywords:
emotions; affect; neuroimaging; functional magnetic resonance imaging; human;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Garrett, AS Univ Calif Davis, Davis Med Ctr, Dept Psychiat, 2230 Stockton Blvd, Sacramento, CA 95817 USA Univ Calif Davis 2230 Stockton Blvd Sacramento CA USA 95817 SA
Citazione:
A.S. Garrett e R.J. Maddock, "Time course of the subjective emotional response to aversive pictures: relevance to fMRI studies", PSYCH RES-N, 108(1), 2001, pp. 39-48

Abstract

Using functional magnetic resonance imaging (fMRI) to study brain activityrelated to the experience of emotion presents unique challenges to neuroscientists. One important consideration arises when an experimentally inducedsubjective emotional response persists after the end of the emotional stimulation epoch. In this case, brain activity related to the emotional response may continue during the subsequent control or comparison epoch. The comparison epoch of the experiment may then contain a lingering emotional response. This study was conducted to better understand the time course of the subjective emotional response to intensely aversive pictures, with the goal of applying this knowledge to the design and analysis of fMRI studies of emotion. A total of 18 women in two separate experiments were shown a series of aversive, neutral and scrambled pictures presented in alternating block designs. Subjects rated the intensity of their negative feelings every 4 s.while viewing the pictures. Results indicate that the subjective emotionalresponse persists well after the end of the emotional stimulation epoch. Following a 16-s block of aversive pictures, an average of an additional 16 s elapsed before self-reported negative feelings showed a 74-80% decline. These data suggest that fMRI studies of emotion should consider the time course of the subjective response to emotionally laden stimuli. (C) 2001 Elsevier Science Ireland Ltd. ALI rights reserved.

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Documento generato il 29/02/20 alle ore 14:58:33