Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10225565 | Schizophrenia Research | 2018 | 9 Pages |
Abstract
This study integrates two resting-state functional magnetic resonance imaging (fMRI) analysis methods - amplitudes of low-frequency fluctuations (ALFF) and functional network connectivity (FNC) - to explore the hypotheses that (1) abnormal FNC between salience and sensory (visual/auditory) networks underlies hallucinations in schizophrenia, and (2) disrupted hippocampal oscillations (as measured by hippocampal ALFF) beget changes in FNC linked to hallucinations. Our first hypothesis was supported by the finding that schizophrenia patients reporting hallucinations have higher FNC between the salience network and an associative auditory network relative to healthy controls. Hippocampal ALFF was negatively associated with FNC between primary auditory cortex and the salience network in healthy subjects, but was positively associated with FNC between these networks in patients reporting hallucinations. These findings provide indirect support favoring our second hypothesis. We suggest future studies integrate fMRI with electroencephalogram (EEG) and/or magnetoencephalogram (MEG) methods to directly probe the temporal relation between altered hippocampal oscillations and changes in cross-network functional communication.
Related Topics
Life Sciences
Neuroscience
Behavioral Neuroscience
Authors
Stephanie M. Hare, Alicia S. Law, Judith M. Ford, Daniel H. Mathalon, Aral Ahmadi, Eswar Damaraju, Juan Bustillo, Aysenil Belger, Hyo Jong Lee, Bryon A. Mueller, Kelvin O. Lim, Gregory G. Brown, Adrian Preda, Theo G.M. van Erp, Steven G. Potkin,