Aberrant "default mode" functional connectivity in schizophrenia

Abigail G. Garrity, Godfrey D. Pearlson, Kristen McKiernan, Dan Lloyd, Kent A. Kiehl, Vince D. Calhoun

Research output: Contribution to journalArticlepeer-review

808 Scopus citations


Objective: The "default mode" has been defined as a baseline condition of brain function and is of interest because its component brain regions are believed to be abnormal in schizophrenia. It was hypothesized that the default mode network would show abnormal activation and connectivity in patients with schizophrenia. Method: Patients with schizophrenia (N=21) and healthy comparison subjects (N=22) performed an auditory oddball task during functional magnetic resonance imaging (fMRI). Independent component analysis was used to identify the default mode component. Differences in the spatial and temporal aspects of the default mode network were examined in patients versus comparison subjects. Results: Healthy comparison subjects and patients had significant spatial differences in the default mode network, most notably in the frontal, anterior cingulate, and parahippocampal gyri. In addition, activity in patients in the medial frontal, temporal, and cingulate gyri correlated with severity of positive symptoms. The patients also showed significantly higher frequency fluctuations in the temporal evolution of the default mode. Conclusions: Schizophrenia is associated with altered temporal frequency and spatial location of the default mode network. The authors hypothesized that this network may be under- or overmodulated by key regions, including the anterior and posterior cingulate cortex. In addition, the altered temporal fluctuations in patients may result from a change in the connectivity of these regions with other brain networks.

Original languageEnglish (US)
Pages (from-to)450-457
Number of pages8
JournalAmerican Journal of Psychiatry
Issue number3
StatePublished - Mar 2007

ASJC Scopus subject areas

  • Psychiatry and Mental health


Dive into the research topics of 'Aberrant "default mode" functional connectivity in schizophrenia'. Together they form a unique fingerprint.

Cite this