Attentional modulation of perceptual organisation in schizophrenia
INTRODUCTION: Previous studies indicated impaired perceptual organisation in schizophrenia. This study investigated lateral connection and attentional modulation in early visual cortex of schizophrenia patients. METHODS: Contrast threshold was measured for a central Gabor patch, flanked with orthogo...
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| Dokumentumtípus: | Cikk |
| Megjelent: |
2009
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| Sorozat: | COGNITIVE NEUROPSYCHOLOGY
14 No. 2 |
| Tárgyszavak: | |
| doi: | 10.1080/13546800902757936 |
| mtmt: | 1340882 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/37823 |
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| 024 | 7 | |a 10.1080/13546800902757936 |2 doi | |
| 024 | 7 | |a 1340882 |2 mtmt | |
| 040 | |a SZTE Publicatio Repozitórium |b hun | ||
| 041 | |a eng | ||
| 100 | 1 | |a Kéri Szabolcs | |
| 245 | 1 | 0 | |a Attentional modulation of perceptual organisation in schizophrenia |h [elektronikus dokumentum] / |c Kéri Szabolcs |
| 260 | |c 2009 | ||
| 300 | |a 77-86 | ||
| 490 | 0 | |a COGNITIVE NEUROPSYCHOLOGY |v 14 No. 2 | |
| 520 | 3 | |a INTRODUCTION: Previous studies indicated impaired perceptual organisation in schizophrenia. This study investigated lateral connection and attentional modulation in early visual cortex of schizophrenia patients. METHODS: Contrast threshold was measured for a central Gabor patch, flanked with orthogonal and collinear Gabor patches. In the attended condition, participants performed a concurrent vernier task by determining the spatial offset of the flankers. RESULTS: The controls (n=25) had lower contrast thresholds in the collinear condition than in the orthogonal condition, whereas the schizophrenia patients (n=43) did not benefit from the presence of collinear flankers. This deficit was not ameliorated by attentional modulation. Antipsychotic medication did not affect the performance. CONCLUSIONS: These results suggest that lateral connections are impaired in early visual cortex of schizophrenia patients. This deficit cannot be restored by top-down attentional modulation of target-flanker interactions. | |
| 650 | 4 | |a Klinikai orvostan | |
| 700 | 0 | 1 | |a Kelemen Oguz |e aut |
| 700 | 0 | 1 | |a Benedek György |e aut |
| 856 | 4 | 0 | |u http://publicatio.bibl.u-szeged.hu/37823/1/134088258.2009perceptualisorganizacio.pdf |z Dokumentum-elérés |