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Titolo:
Pavlovian aversive and appetitive odor conditioning in humans: subjective,peripheral, and electrocortical changes
Autore:
Hermann, C; Ziegler, S; Birbaumer, N; Flor, H;
Indirizzi:
Humboldt Univ, Dept Psychol, Sect Clin Psychol & Behav Neurosci, D-10117 Berlin, Germany Humboldt Univ Berlin Germany D-10117 v Neurosci, D-10117 Berlin, Germany Univ Tubingen, Inst Med Psychol & Behav Neurobiol, D-72074 Tubingen, Germany Univ Tubingen Tubingen Germany D-72074 robiol, D-72074 Tubingen, Germany Univ Padua, Dipartimento Psicol Gen, Padua, Italy Univ Padua Padua Italy niv Padua, Dipartimento Psicol Gen, Padua, Italy
Titolo Testata:
EXPERIMENTAL BRAIN RESEARCH
fascicolo: 2, volume: 132, anno: 2000,
pagine: 203 - 215
SICI:
0014-4819(200005)132:2<203:PAAAOC>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; STARTLE REFLEX; SLOW POTENTIALS; AMYGDALA; FEAR; BRAIN; EMOTION; MODULATION; LESIONS; DISGUST;
Keywords:
odor conditioning; aversive learning; appetitive learning; human; psychophysiological correlates;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Hermann, C Humboldt Univ, Dept Psychol, Sect Clin Psychol & Behav Neurosci, Hausvogteiplatz 5-7, D-10117 Berlin, Germany Humboldt Univ Hausvogteiplatz 5-7 Berlin Germany D-10117 rmany
Citazione:
C. Hermann et al., "Pavlovian aversive and appetitive odor conditioning in humans: subjective,peripheral, and electrocortical changes", EXP BRAIN R, 132(2), 2000, pp. 203-215

Abstract

Differential Pavlovian conditioning of aversive and appetitive odors was examined in 30 male healthy subjects. The appetitive conditioning group (n=15) received a pleasant odor (vanilla), the aversive conditioning group (n=15) an unpleasant odor (fermented yeast) as unconditioned stimulus. Slides of two different neutral faces that were easy to discriminate served as conditioned stimuli (CS). An EEC was recorded from nine electrodes. Electromyographic activity was measured bilaterally from the m. corrugator supercilii and m, zygomaticus. The startle response was obtained from the m. orbicularis oculi. Finally, heart rate and skin conductance response were assessed. The subjective data and the skin conductance response revealed successful differential aversive conditioning. By contrast, the pleasant odor failed toproduce appetitive odor conditioning. The conditioned and unconditioned response of the corrugator muscles confirm previous reports on the m. corrugator being strongly involved in the expression of negative affect. Contrary to previous findings, magnitude of the startle reflex was not found to be modulated depending on the valence of the CS. Central psychophysiological parameters showed little change during differential conditioning. The presence of subjective-evaluative conditioning and contingency awareness without significant changes in cortical and cardiovascular correlates might be due to extremely localized cortical processing of conditioned olfactory cues or primarily subcortical processing. The latter interpretation is strengthenedby the presence of differential conditioning in non-voluntary responses such as the corrugator muscles.

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Documento generato il 25/01/20 alle ore 16:09:44