Journal
NEUROIMAGE
Volume 49, Issue 4, Pages 2901-2906Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.neuroimage.2009.11.072
Keywords
Schizophrenia; Resting-state MRI; Amplitude of low-frequency fluctuation; First episode; Medial prefrontal lobe; Putamen
Funding
- National Natural Science Foundation of China [30625024, 30530300-2006/R3, 30728017, 30700256]
- National Basic Research Program of China [2007CB512301/2/5]
- National High Technology Program of China [2008AA02Z408]
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Background: Spontaneous low-frequency fluctuations (LFF) in the blood oxygen level-dependent (BOLD) functional magnetic resonance imaging (fMRI) signal have been shown to reflect cerebral spontaneous neural activity, and the present study attempts to explore the functional changes in the regional brain in patients with schizophrenia using the amplitude of the BOLD signals. Methods: A total of 66 treatment-naive, first-episode schizophrenia (FES) patients and 66 normal age- and sex-matched controls were recruited. Resting-state fMRIs were obtained using a gradient-echo echo-planar imaging sequence. The amplitude of LFF (ALFF) was calculated using REST software. Voxel-based analysis of the ALFF maps between control and patient groups was performed with twos-sample t-tests using SPM2. Results: Compared to the controls, the FES group showed significantly decreased ALFF in the medial prefrontal lobe (MPFC) and significant increases in the ALFF in the left and right putamen. Significant positive correlations were observed between ALFF values in the bilateral putamen in both the patient and control groups. Conclusions: Alterations of the ALFF in the MPFC and putamen in FES observed in the present study suggest that the functional abnormalities of those areas are at an early stage of the disease. (C) 2009 Elsevier Inc. All rights reserved.
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