ArticleClinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology2025
Attenuated theta-band activity and cross-frequency coupling in schizophrenia during affective response inhibition.
Article in Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveSchizophrenia (SZ) is marked by impaired cognitive control; however, the underlying neural mechanisms remain unclear. This study examined theta-band (4-7 Hz) neural oscillatory activity and cross-frequency coupling with gamma (30-50 Hz) in an affective cognitive control paradigm in SZ in comparison with healthy controls (HC) and those with bipolar disorder (BD).
methodsThirty-two participants with SZ, 67 with BD, and 48 HC completed an affective Go/No-Go Task with emotional face stimuli during electroencephalography recording. Time-frequency decomposition quantified theta-band power and intertrial phase consistency (ITPC) over midline fronto-central areas. Theta-gamma phase-amplitude coupling (PAC; Kullback-Leibler Modulation Index) was indexed within the midline frontal area and cross-regionally between midline frontal theta and bilateral parietal gamma.
resultsParticipants with SZ displayed decreased midline frontal theta power, ITPC, and local midline frontal theta-gamma PAC compared to HC, with BD falling in between SZ and HC groups across all these measures. Theta power, ITPC, and theta-gamma PAC were correlated with behavioral performance, particularly in the SZ group.
conclusionFindings show abnormalities across the amplitude, phase consistency, and cross-frequency coordination aspects of theta-related activity when individuals with SZ engage in affective cognitive control. SIGNIFICANCE: This study supports the assertion that SZ is associated with abnormal theta-related neural activity.
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