BACKGROUND: Major depressive disorder (MDD) is associated with altered neural activity in the default mode network (DMN). In the present study, we used a fractional amplitude of low-frequency fluctuations (fALFF) approach to directly investigate the features of spontaneous brain activity of the DMN in patients with the first-episode, drug-naive MDD at rest. METHODS: Twenty-four first-episode, drug-naive patients with MDD and 24 age-, gender-, and education-matched healthy subjects participated in the study. The fALFF and independent component analysis (ICA) approaches were utilized to analyze the data. RESULTS: Patients with MDD exhibited a dissociation pattern of resting-state fALFF in the DMN, with increased fALFF in the left dorsal medial prefrontal cortex (MPFC) and decreased fALFF in the left parahippocampal gyrus (PHG). The increased fALFF values of the left dorsal MPFC were positively correlated to the Hamilton Rating Scale for Depression (HRSD) scores. CONCLUSIONS: Our results first suggested that there was a dissociation pattern of resting-state fALFF in the DMN in patient with MDD, which highlighted the importance of the DMN in the pathogenesis of MDD.
BACKGROUND: Major depressive disorder (MDD) is associated with altered neural activity in the default mode network (DMN). In the present study, we used a fractional amplitude of low-frequency fluctuations (fALFF) approach to directly investigate the features of spontaneous brain activity of the DMN in patients with the first-episode, drug-naive MDD at rest. METHODS: Twenty-four first-episode, drug-naive patients with MDD and 24 age-, gender-, and education-matched healthy subjects participated in the study. The fALFF and independent component analysis (ICA) approaches were utilized to analyze the data. RESULTS:Patients with MDD exhibited a dissociation pattern of resting-state fALFF in the DMN, with increased fALFF in the left dorsal medial prefrontal cortex (MPFC) and decreased fALFF in the left parahippocampal gyrus (PHG). The increased fALFF values of the left dorsal MPFC were positively correlated to the Hamilton Rating Scale for Depression (HRSD) scores. CONCLUSIONS: Our results first suggested that there was a dissociation pattern of resting-state fALFF in the DMN in patient with MDD, which highlighted the importance of the DMN in the pathogenesis of MDD.
Authors: Lucie Bartova; Bernhard M Meyer; Kersten Diers; Ulrich Rabl; Christian Scharinger; Ana Popovic; Gerald Pail; Klaudius Kalcher; Roland N Boubela; Julia Huemer; Dominik Mandorfer; Christian Windischberger; Harald H Sitte; Siegfried Kasper; Nicole Praschak-Rieder; Ewald Moser; Burkhard Brocke; Lukas Pezawas Journal: J Psychiatr Res Date: 2015-03-06 Impact factor: 4.791
Authors: Tereza Nekovarova; Anna Yamamotova; Karel Vales; Ales Stuchlik; Jitka Fricova; Richard Rokyta Journal: Front Behav Neurosci Date: 2014-03-25 Impact factor: 3.558
Authors: T Yamamura; Y Okamoto; G Okada; Y Takaishi; M Takamura; A Mantani; A Kurata; Y Otagaki; H Yamashita; S Yamawaki Journal: Transl Psychiatry Date: 2016-03-08 Impact factor: 6.222