Paracingulate Sulcus Length and Cortical Thickness in Schizophrenia Patients With and Without a Lifetime History of Auditory Hallucinations

Branislava Ćurčić-Blake*, Annemarie de Vries, Remco J Renken, Jan Bernard C Marsman, Jane Garrison, Kenneth Hugdahl, André Aleman

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

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BACKGROUND: It has been theorized that hallucinations, a common symptom of schizophrenia, are caused by failures in reality monitoring. The paracingulate sulcus (PCS) has been implicated as a brain structure supporting reality monitoring with the absence or shorter length of PCS associated with an occurrence of hallucinations in schizophrenia. The absence or shorter length of PCS has been associated with an occurrence of hallucinations. There are inconsistent findings in the literature regarding the role of the asymmetry of this structure for hallucinations. Here, we investigated the length of the PCS and cortical thickness of surrounding structures in patients with a lifetime history of auditory verbal hallucinations (AVH).

DESIGN: Seventy-seven patients and twenty-eight healthy controls (HC) underwent an anatomical MRI scan. PCS length and cortical thickness were estimated using Mango brain visualization and FreeSurfer, respectively. Patients with AVH (n = 45) and patients without AVH were compared (n = 32) to the controls.

RESULTS: PCS length significantly differed between HC and patient groups (F(2,102) = 3.57, P = .032) in the left but not in the right sulcus. We found significantly longer PCS between HC and AVH group but no difference between patient groups. Similarly, we found significant thinning of cortical structures including structures surrounding anterior parts of PCS between HC and patients either in general or per group, but no significant differences were observed between patient groups.

CONCLUSIONS: PCS length in the left hemisphere is shorter in schizophrenia patients with hallucinations as compared to HC subjects. The patient group without hallucinations was in between those 2 groups. Cortical thickness of neighboring areas of PCS is diminished in patient groups relative to the healthy comparison subjects. The role of lateralization and functional involvement of the PCS region in processes underlying hallucinations, such as reality monitoring, needs further clarification.

Originele taal-2English
Pagina's (van-tot)S48-S57
Aantal pagina's10
TijdschriftSchizophrenia Bulletin
Nummer van het tijdschriftSupplement_1
StatusPublished - 25-feb.-2023


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