Publications

@article{Wiens2004,
title = {Keeping it short: A comparison of methods for brief picture presentation},
author = {S Wiens and P Fransson and T Dietrich and P Lohmann and M Ingvar and A \"{O}hman},
doi = {10.1111/j.0956-7976.2004.00667.x},
issn = {0956-7976},
year = {2004},
date = {2004-04-01},
journal = {Psychological Science},
volume = {15},
number = {4},
pages = {282--285},
abstract = {Research has shown that backward masking is a powerful tool for studying unconscious mental processes. Whereas studies have traditionally presented stimuli using cathode-ray tube (CRT) monitors or mechanical shutters together with slide projectors, recent studies (mainly in functional magnetic resonance imaging, fMRI) have begun to use methods based on liquid crystal displays (LCDs) and thin-film transistor (TFT) technology. However, because of differences in technology, all methods may not be equally suited for masking. When methods were compared for their accuracy in presenting pictures at short durations, LCD and TFT presentations had poor accuracy, but shutter and CRT presentations had better accuracy. Because CRTs interfere with the imaging process in fMRI, we recommend the use of mechanical shutters. However, our results may not generally apply to all displays, so we advise researchers to validate the presentation parameters of their displays. The procedure described here may be useful for that purpose.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Critchley2004,
title = {Neural systems supporting interoceptive awareness},
author = {H D Critchley and S Wiens and P Rotshtein and A \"{O}hman and R J Dolan},
doi = {10.1038/nn1176},
issn = {1097-6256},
year = {2004},
date = {2004-02-01},
journal = {Nature Neuroscience},
volume = {7},
number = {2},
pages = {189--195},
abstract = {Influential theories of human emotion argue that subjective feeling states involve representation of bodily responses elicited by emotional events. Within this framework, individual differences in intensity of emotional experience reflect variation in sensitivity to internal bodily responses. We measured regional brain activity by functional magnetic resonance imaging (fMRI) during an interoceptive task wherein subjects judged the timing of their own heartbeats. We observed enhanced activity in insula, somatomotor and cingulate cortices. In right anterior insular/opercular cortex, neural activity predicted subjects' accuracy in the heartbeat detection task. Furthermore, local gray matter volume in the same region correlated with both interoceptive accuracy and subjective ratings of visceral awareness. Indices of negative emotional experience correlated with interoceptive accuracy across subjects. These findings indicate that right anterior insula supports a representation of visceral responses accessible to awareness, providing a substrate for subjective feeling states.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Lundqvist2004,
title = {The face of wrath: The role of features and configurations in conveying social threat},
author = {D Lundqvist and F Esteves and A \"{O}hman},
doi = {10.1080/02699930244000453},
issn = {0269-9931},
year = {2004},
date = {2004-02-01},
journal = {Cognition & Emotion},
volume = {18},
number = {2},
pages = {161--182},
abstract = {We examined the role of single features and feature configurations in the effect of schematic faces on rated threat. A total of 101 medical students rated their emotional impression of schematic facial stimuli using semantic differential scales (Activity, Negative Valence, and Potency). In different parts of the experiment, the ratings concerned single features, eyebrow‐mouth configurations, or complete faces. Although eyebrows emerged as the overall most important feature, the effect of features was modulated by configuration. Simple configurations of eyebrows and mouth appeared to convey threat and nonthreat in a way highly similar to that of complete faces. In most cases, the configurations of eyebrows and mouth could significantly predict the effect of the complete faces.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Schupp2004,
title = {The facilitated processing of threatening faces: An ERP analysis.},
author = {H T Schupp and A \"{O}hman and M Jungh\"{o}fer and A I Weike and J Stockburger and A O Hamm},
doi = {10.1037/1528-3542.4.2.189},
issn = {1931-1516},
year = {2004},
date = {2004-01-01},
journal = {Emotion},
volume = {4},
number = {2},
pages = {189--200},
abstract = {Threatening, friendly, and neutral faces were presented to test the hypothesis of the facilitated perceptual processing of threatening faces. Dense sensor event-related brain potentials were measured while subjects viewed facial stimuli. Subjects had no explicit task for emotional categorization of the faces. Assessing early perceptual stimulus processing, threatening faces elicited an early posterior negativity compared with nonthreatening neutral or friendly expressions. Moreover, at later stages of stimulus processing, facial threat also elicited augmented late positive potentials relative to the other facial expressions, indicating the more elaborate perceptual analysis of these stimuli. Taken together, these data demonstrate the facilitated perceptual processing of threatening faces. Results are discussed within the context of an evolved module of fear (A. Ohman & S. Mineka, 2001).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Carlsson2004,
title = {Fear and the amygdala: Manipulation of awareness generates differential cerebral responses to phobic and fear-relevant (but nonfeared) stimuli},
author = {K Carlsson and K M Petersson and D Lundqvist and A Karlsson and M Ingvar and A \"{O}hman},
doi = {10.1037/1528-3542.4.4.340},
issn = {1931-1516},
year = {2004},
date = {2004-01-01},
journal = {Emotion},
volume = {4},
number = {4},
pages = {340--353},
abstract = {Rapid response to danger holds an evolutionary advantage. In this positron emission tomography study, phobics were exposed to masked visual stimuli with timings that either allowed awareness or not of either phobic, fear-relevant (e.g., spiders to snake phobics), or neutral images. When the timing did not permit awareness, the amygdala responded to both phobic and fear-relevant stimuli. With time for more elaborate processing, phobic stimuli resulted in an addition of an affective processing network to the amygdala activity, whereas no activity was found in response to fear-relevant stimuli. Also, right prefrontal areas appeared deactivated, comparing aware phobic and fear-relevant conditions. Thus, a shift from top-down control to an affectively driven system optimized for speed was observed in phobic relative to fear-relevant aware processing.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}