A research study led by scientists from the Gregorio Marañón University Hospital in Madrid and the Network of Centres for Biomedical Research in Mental Health Networks (CIBERSAM) shows that adolescents experiencing a first outbreak of psychosis have lower levels of grey matter in their brains than healthy teenagers. Strangely, this change was seen in patients suffering from various psychoses, including bipolar illness and schizophrenia.
The objective of the study was to examine and locate differences in the volume of grey matter in the brains of healthy people (controls) and individuals diagnosed with psychotic outbreaks in infancy or adolescence. The researchers broke such psychosis down into three sub-groups - schizophrenia, bipolar disorder and other psychoses that did not fit into either of the other two classifications.
The study, published recently in the Journal of the American Academy of Child and Adolescent Psychiatry, analysed a sample of 121 people aged between 7 and 18, inclusive. All the patients and controls were examined using magnetic resonance imaging in order to detect any possible changes in the structure of their brains.
"The interesting thing was that we found common alterations among those with two types of clinically-differentiated psychoses, schizophrenia and bipolar disorder, and this could help to improve diagnosis of these illnesses," Santiago Reig, one of the study's authors and a researcher in the Medical Imaging Laboratory of the Gregorio Marañón Hospital, tells SINC.
The study confirmed these lower levels of grey matter, the brain substance in which neurone cells are concentrated. This lack, which was shared between the schizophrenia and type 1 bipolar illness sufferers, means the functions of this part of the brain are "somehow atrophied".
In addition, the technique used by the experts can pinpoint the location of these alterations. For example, "patients with early psychotic outbreaks (before the age of 18) showed alterations in the medial prefrontal gyrus region of the brain, which controls processes such as cognition and the regulation of sensations", says Reig.
Improving diagnosis