MRI of cortical folds may help predict psychosis

By Kate Madden Yee, staff writer

April 26, 2018 -- MRI can help predict which patients with prepsychotic symptoms will go on to develop full-blown psychosis by providing information about the folds of the brain's outer surface, according to a study published online April 25 in JAMA Psychiatry.

The information can then be used to begin early intervention therapy with these patients, noted researchers from Western University and Lawson Health Research Institute in London, Ontario, Canada.

Simplified representation of cortical folding in different brain regions
Simplified representation of cortical folding in different brain regions. Image courtesy of University Psychiatric Clinics Basel.

A team led by Dr. Lena Palaniyappan collaborated with scientists at the University of Basel in Switzerland on an MRI technique that examines folds in the brain's surface, or cortical folds. The group collected MRI data from 161 participants:

  • 44 healthy control subjects
  • 38 people who had experienced first-episode psychosis
  • 79 people who had an increased risk of psychosis

The researchers followed these patients for four years, tracking which ones developed psychotic disorders such as schizophrenia.

Palaniyappan and colleagues found that the way the brain was folded, called gyrification, could predict who would develop psychosis with more than 80% accuracy. The brain's folding pattern is mostly established by the time a person is 2 years old, which suggests that psychotic illness is developmental rather than degenerative, the researchers concluded.

"In search of the neural mechanisms that contribute to emerging psychosis, developmental processes are increasingly recognized to be crucial," they wrote.

Copyright © 2018

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