Cited by 129Schizophrenia research and treatmentFunctional Brain Connectivity StudiesNeural dynamics and brain function

Increased Resting-State Gamma-Band Connectivity in First-Episode Schizophrenia

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Andreou, Christina, Nolte, Guido, Leicht, Gregor, Polomac, Nenad, Hanganu-Opatz, Ileana L., Lambert, Martin, Engel, Andreas K., Mulert, Christoph·2015·Schizophrenia Bulletin

Abstract

BACKGROUND: Schizophrenia has long been suggested to represent a disorder with prominent neural dysconnectivity. Gamma-band oscillations are highly relevant in this context, due both to their proposed involvement in neuronal synchronization and to their association with neurotransmitter systems relevant for schizophrenia. Several task-related studies have confirmed reduced power and synchronization of gamma-band oscillations in schizophrenia, but it has been suggested that these findings might not apply to the resting state. The present study aimed to investigate resting-state gamma-band connectivity in patients with schizophrenia. METHODS: Sixty-four channel resting-state electroencephalography (eyes closed) was recorded in 22 patients with first-episode schizophrenia and 22 healthy controls matched for age and gender. Orthogonalized power envelope correlation was used as a measure of connectivity across 80 cortical regions at 40 Hz. Mean connectivity at each region was compared across groups using the nonparametric randomization approach. Additionally, the network-based statistic was applied to identify affected networks in patients. RESULTS: Patients displayed increased mean functional gamma-band connectivity compared to controls in the left rolandic operculum. Network-based analyses indicated increased connectivity in patients within a strongly lateralized network consisting mainly of left inferior frontal/orbitofrontal, lateral and medial temporal, and inferior parietal areas. Within this network, gamma-band connectivity was higher in patients with low positive and disorganization symptom levels. CONCLUSIONS: The present study provides a link between resting-state gamma-band connectivity and the core symptoms of schizophrenia. The observed findings are different than those reported by task-related studies, suggesting that resting-state studies might reveal new aspects in the pathophysiology of schizophrenia.

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  • Deficits in gamma oscillations have been reported in first episode schizophrenia patients.

    “deficits in gamma oscillations (a type of fast oscillatory activity that requires the function of PV+ fast spiking interneurons) has been reported in first episode schizophrenia patients 69,70 .”

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  1. [48]48. Sheehan DV, Lecrubier Y, Sheehan KH, et al. The Mini-International Neuropsychiatric Interview (M.I.N.I.): the development and validation of a structured diagnostic psychiatric interview for DSM-IV and ICD-10. J Clin Psychiatry. 1998;59(suppl 20):22–33;quiz 34–57. [[PubMed](https://pubmed.ncbi.nlm.nih.gov/9881538/)] [[Google Scholar](https://scholar.google.com/scholar_lookup?journal=J%20Clin%20Psychiatry&title=The%20Mini-International%20Neuropsychiatric%20Interview%20(M.I.N.I.):%20the%20development%20and%20validation%20of%20a%20structured%20diagnostic%20psychiatric%20interview%20for%20DSM-IV%20and%20ICD-10&author=DV%20Sheehan&author=Y%20Lecrubier&author=KH%20Sheehan&volume=59&issue=suppl%2020&publication_year=1998&pages=22-33&pmid=9881538&)] *
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Authors
Andreou, C., Nolte, G., Leicht, G., Polomac, N., Hanganu-Opatz, I. L., Lambert, M., Engel, A. K., & Mulert, C.
Affiliations
University Medical Center Hamburg-Eppendorf (DE)
Corresponding author
Andreou, Christina
Venue
Schizophrenia Bulletin
Published
2014-08-28
Volume
41
Issue
4
Pages
930-939
ISSN
  • 0586-7614 (ISSN-L)
  • 1745-1701
OpenAlex
W2028800859
Cited by
129
References
94
Citations by year
2026: 8 · 2025: 8 · 2024: 7 · 2023: 4 · 2022: 10 · 2021: 7 · 2020: 17 · 2019: 10 · 2018: 15 · 2017: 11 · 2016: 14 · 2015: 12 · 2014: 5
FWCI
10.69
Type
journal article
Language
en
Open access
Locations
  • Schizophrenia Bulletin (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
schizophrenia, first-episode schizophrenia
MeSH terms
Adult, Cerebral Cortex, Electroencephalography, Female, Humans, Magnetic Resonance Imaging, Male, Nerve Net, Schizophrenia, Young Adult, Connectome, Gamma Rhythm

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