Reduced facilitation effect of collinear flankers on contrastdetection reveals impaired lateral connectivity in the visual cortex of schizophrenia patients

Must, Anita; Janka, Zoltán; Benedek, György; Kéri, Szabolcs

doi:10.1016/j.neulet.2003.12.046

Cited by 68Visual perception and processing mechanismsSchizophrenia research and treatmentHallucinations in medical conditions

Reduced facilitation effect of collinear flankers on contrastdetection reveals impaired lateral connectivity in the visual cortex of schizophrenia patients

Must, Anita, Janka, Zoltán, Benedek, György, Kéri, Szabolcs·2004·Neuroscience Letters

DOI 10.1016/j.neulet.2003.12.046

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Abstract

The aim of this study was to investigate lateral connectivity in early visual cortex of schizophrenia patients. Contrast thresholds were measured for centrally presented Gabor patches which were surrounded by two collinear or orthogonal flankers. The healthy subjects (n = 15) showed lower contrast thresholds for central Gabor patches when collinear flankers were presented. This effect was significantly reduced in unmedicated highly functioning schizophrenia patients (n = 20) who performed normally on the continuous performance test. The performance of the patients did not correlate with the positive and negative symptoms. The facilitation effect of collinear flankers is believed to reflect lateral interactions between feature-specific units in early visual cortex (V1). Our results therefore suggest abnormal lateral interactions in early visual cortex of schizophrenia patients.

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Gain control of neural responses is achieved through a combination of intrinsic neuronal properties, lateral interactions and feedback modulations.
“Gain control of neural responses is achieved through a combination of intrinsic neuronal properties, lateral interactions and feedback modulations (Must et al., 2004).”
From What visual illusions teach us about schizophrenia (2014) · cites this paper as Must et al., 2004

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Authors: Must, A., Janka, Z., Benedek, G., & Kéri, S.
Affiliations: University of Szeged (HU)
Corresponding author: Kéri, Szabolcs
ORCID: Must, Anita
Kéri, Szabolcs
Venue: Neuroscience Letters
Publisher: Elsevier BV
Published: 2004-03
Volume: 357
Issue: 2
Pages: 131-134
ISSN: 0304-3940 (ISSN-L)
DOI: 10.1016/j.neulet.2003.12.046
OpenAlex: W1979730475
Cited by: 68
References: 18
Citations by year: 2026: 2 · 2025: 2 · 2024: 1 · 2022: 3 · 2019: 2 · 2018: 2 · 2017: 1 · 2016: 4 · 2015: 6 · 2014: 8 · 2013: 8 · 2012: 3
FWCI: 1.17
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations: Neuroscience Letters (publishedVersion)
PubMed (publishedVersion)
Topics: Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
Life Sciences › Neuroscience › Cognitive Neuroscience › Hallucinations in medical conditions
Keywords: schizophrenia, lateral connections, visual cortex, contrast detection, early visual cortex, Gabor patches, visual attention
MeSH terms: Adult, Analysis of Variance, Female, Humans, Male, Middle Aged, Photic Stimulation, Schizophrenia, Visual Cortex, Contrast Sensitivity

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Reduced facilitation effect of collinear flankers on contrastdetection reveals impaired lateral connectivity in the visual cortex of schizophrenia patients

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