The Difference of Grey Matter Volume Among the Patients of Schizophrenia

Schizophrenia (SCZ) is a heritable complex phenotype whose symptoms can be clustered into three domains: positive symptoms, negative symptoms and cognitive impairments. Constellations of negative symptoms in SCZ are composed of diminished motivation and pleasure, such as asociality, anhedonia, and avolition, or diminished expressivity such as blunted affect and alogia. Negative symptoms are associated with decreased quality of life and poor functional outcomes. Although antipsychotics are generally effective on positive symptoms, they are poorly effective on negative symptoms Currently, there are no licensed targeted medications for negative symptoms. In view of these problems, considerable interest in identifying new treatment targets for negative symptoms has grown over the past decade. Despite intense efforts in brain imaging that have opened new opportunities for addressing these issues, the neurobiological mechanism of negative symptoms remains unclear.

Structural brain measures from magnetic resonance imaging (MRI) are highly heritable and representatively have high reproducibility and low measurement error. Prior neuroimaging researches have consistently shown neuroanatomical abnormalities in the brains of individuals with SCZ, with the most robust and consistent group-level structural differences in widespread reduced volumes of hippocampal thalamus, amygdala and nucleus accumbens. SCZ have been associated with widespread structural brain abnormalities, but results from neuroimaging studies have been inconsistent.