Exploring the relationship between hallucination proneness and brain morphology.

Area of Science:

• Neuroscience
• Cognitive Psychology

Background:

• Hallucinations are linked to brain structure changes, especially in language cortical areas.
• Existing models on brain volume and hallucination proneness lack substantial empirical support.

Purpose of the Study:

• To investigate the relationship between hallucination proneness and brain volume in specific language-related cortical regions.
• To examine auditory and visual hallucination proneness in relation to superior temporal gyrus and Broca's area volumes.

Main Methods:

• Assessed hallucination proneness using the Launay-Slade Hallucination Scale (LSHS) in 68 university students.
• Measured brain volume in the superior temporal gyrus and Broca's area using structural MRI scans.

Main Results:

• Found significant positive correlations between LSHS scores and brain volume in the superior temporal gyrus and Broca's area.
• Individuals with higher hallucination proneness showed larger brain volumes in these language regions compared to low-proneness individuals.

Conclusions:

• Higher brain volumes in language areas may correlate with increased hallucination proneness in non-clinical populations.
• This finding challenges existing models and suggests a complex relationship between brain structure and hallucinatory experiences.