TY  - JOUR
A1  - Kühnpast, Nicole
A1  - Gramann, Klaus
A1  - Pollatos, Olga
T1  - Electrophysiologic evidence for multilevel deficits in emotional face processing in patients with Bulimia Nervosa
JF  - Psychosomatic medicine
N2  - Background: Empirical evidence suggests substantial deficits regarding emotion recognition in bulimia nervosa (BN). The aim of the current study was to investigate electrophysiologic evidence for deficits in emotional face processing in patients with BN. Methods: Event-related potentials were recorded from 13 women with BN and 13 matched healthy controls while viewing neutral, happy, fearful, and angry facial expressions. Participants' recognition performance for emotional faces was tested in a subsequent categorization task. In addition, the degree of alexithymia, depression, and anxiety were assessed via questionnaires. Results: Categorization of emotional faces was hampered in BN (p = .01). Amplitudes of event-related potentials differed during emotional face processing: face-specific N170 amplitudes were less pronounced for angry faces in patients with BN (mean [M] [standard deviation {SD}] = 1.46 [0.56] mu V versus M [SD] = -1.23 [0.61] mu V, p = .02). In contrast, P3 amplitudes were more pronounced in patients with BN as compared with controls (M [SD] = 2.64 [0.46] mu V versus M [SD] = 1.25 [0.39] mu V, p = .04), independent of emotional expression. Conclusions: The study provides novel electrophysiologic data showing that emotional faces are processed differently in patients with BN as compared with healthy controls. We suggest that deficits in early automatic emotion classification in BN are followed by an increased allocation of attentional resources to compensate for those deficits. These findings might contribute to a better understanding of the impaired social functioning in BN.
KW  - eating disorders
KW  - bulimia nervosa
KW  - EEG
KW  - emotions
KW  - face recognition
KW  - N170
KW  - N2
KW  - P3
Y1  - 2012
U6  - https://doi.org/10.1097/PSY.0b013e31825ca15a
SN  - 0033-3174
VL  - 74
IS  - 7
SP  - 736
EP  - 744
PB  - Lippincott Williams & Wilkins
CY  - Philadelphia
ER  - 
TY  - JOUR
A1  - Dimigen, Olaf
A1  - Kliegl, Reinhold
A1  - Sommer, Werner
T1  - Trans-saccadic parafoveal preview benefits in fluent reading: A study with fixation-related brain potentials
JF  - NeuroImage : a journal of brain function
N2  - During natural reading, a parafoveal preview of the upcoming word facilitates its subsequent recognition (e.g., shorter fixation durations compared to masked preview) but nothing is known about the neural correlates of this so-called preview benefit. Furthermore, while the evidence is strong that readers preprocess orthographic features of upcoming words, it is controversial whether word meaning can also be accessed parafoveally. We investigated the timing, scope, and electrophysiological correlates of parafoveal information use in reading by simultaneously recording eye movements and fixation-related brain potentials (FRPs) while participants read word lists fluently from left to right. For one word the target (e.g., "blade") parafoveal information was manipulated by showing an identical ("blade"), semantically related ("knife"), or unrelated ("sugar") word as preview. In boundary trials, the preview was shown parafoveally but changed to the correct target word during the incoming saccade. Replicating classic findings, target words were fixated shorter after identical previews. In the EEG, this benefit was reflected in an occipitotemporal preview positivity between 200 and 280 ms. In contrast, there was no facilitation from related previews. In parafoveal-on-foveal trials, preview and target were embedded at neighboring list positions without a display change. Consecutive fixation of two related words produced N400 priming effects, but only shortly (160 ms) after the second word was directly fixated. Results demonstrate that neural responses to words are substantially altered by parafoveal preprocessing under normal reading conditions. We found no evidence that word meaning contributes to these effects. Saccade-contingent display manipulations can be combined with EEG recordings to study extrafoveal perception in vision.
KW  - EEG
KW  - Eye tracking
KW  - Active vision
KW  - Eye-fixation-related potentials (EFRP)
KW  - Parafoveal vision
KW  - Boundary technique
Y1  - 2012
U6  - https://doi.org/10.1016/j.neuroimage.2012.04.006
SN  - 1053-8119
SN  - 1095-9572
VL  - 62
IS  - 1
SP  - 381
EP  - 393
PB  - Elsevier
CY  - San Diego
ER  -