Dynamics of alpha oscillations elucidate facial affect recognition in schizophrenia

Popov, Tzvetan G.; Rockstroh, Brigitte; Popova, Petia; Carolus, Almut; Miller, Gregory A.

Dynamics of alpha oscillations elucidate facial affect recognition in schizophrenia

Dateien

Popov_257917.pdfGröße: 386.05 KBDownloads: 419

Datum

2014

Projekt

Übungsinduzierte cerebrale Reorganisation bei Schizophrenien

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Psychologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Cognitive, Affective, & Behavioral Neuroscience. 2014, 14(1), pp. 364-377. ISSN 1530-7026. eISSN 1531-135X. Available under: doi: 10.3758/s13415-013-0194-2

Zusammenfassung

Impaired facial affect recognition is characteristic of schizophrenia and has been related to impaired social function, but the relevant neural mechanisms have not been fully identified. The present study sought to identify the role of oscillatory alpha activity in that deficit during the process of facial emotion recognition. Neuromagnetic brain activity was monitored while 44 schizophrenia patients and 44 healthy controls viewed 5-s videos showing human faces gradually changing from neutral to fearful or happy expressions or from the neutral face of one poser to the neutral face of another. Recognition performance was determined separately by self-report. Relative to prestimulus baseline, controls exhibited a 10- to 15-Hz power increase prior to full recognition and a 10- to 15-Hz power decrease during the postrecognition phase. These results support recent proposals about the function of alpha-band oscillations in normal stimulus evaluation. The patients failed to show this sequence of alpha power increase and decrease and also showed low 10- to 15-Hz power and high 10- to 15-Hz connectivity during the prestimulus baseline. In light of the proposal that a combination of alpha power increase and functional disconnection facilitates information intake and processing, the finding of an abnormal association of low baseline alpha power and high connectivity in schizophrenia suggests a state of impaired readiness that fosters abnormal dynamics during facial affect recognition.

Fachgebiet (DDC)

150 Psychologie

Schlagwörter

Schizophrenia, Facial affect recognition, Alpha oscillations, Emotion, Event processing, Functional connectivity, Neural networks

Zitieren

ISO 690

POPOV, Tzvetan G., Brigitte ROCKSTROH, Petia POPOVA, Almut CAROLUS, Gregory A. MILLER, 2014. Dynamics of alpha oscillations elucidate facial affect recognition in schizophrenia. In: Cognitive, Affective, & Behavioral Neuroscience. 2014, 14(1), pp. 364-377. ISSN 1530-7026. eISSN 1531-135X. Available under: doi: 10.3758/s13415-013-0194-2

BibTex

@article{Popov2014-03Dynam-25791,
  year={2014},
  doi={10.3758/s13415-013-0194-2},
  title={Dynamics of alpha oscillations elucidate facial affect recognition in schizophrenia},
  number={1},
  volume={14},
  issn={1530-7026},
  journal={Cognitive, Affective, & Behavioral Neuroscience},
  pages={364--377},
  author={Popov, Tzvetan G. and Rockstroh, Brigitte and Popova, Petia and Carolus, Almut and Miller, Gregory A.}
}

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    <dcterms:abstract xml:lang="eng">Impaired facial affect recognition is characteristic of schizophrenia and has been related to impaired social function, but the relevant neural mechanisms have not been fully identified. The present study sought to identify the role of oscillatory alpha activity in that deficit during the process of facial emotion recognition. Neuromagnetic brain activity was monitored while 44 schizophrenia patients and 44 healthy controls viewed 5-s videos showing human faces gradually changing from neutral to fearful or happy expressions or from the neutral face of one poser to the neutral face of another. Recognition performance was determined separately by self-report. Relative to prestimulus baseline, controls exhibited a 10- to 15-Hz power increase prior to full recognition and a 10- to 15-Hz power decrease during the postrecognition phase. These results support recent proposals about the function of alpha-band oscillations in normal stimulus evaluation. The patients failed to show this sequence of alpha power increase and decrease and also showed low 10- to 15-Hz power and high 10- to 15-Hz connectivity during the prestimulus baseline. In light of the proposal that a combination of alpha power increase and functional disconnection facilitates information intake and processing, the finding of an abnormal association of low baseline alpha power and high connectivity in schizophrenia suggests a state of impaired readiness that fosters abnormal dynamics during facial affect recognition.</dcterms:abstract>
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Universitätsbibliographie

Ja