title: Morphometric changes of gray matter in Parkinson's disease with depression: a voxel-based morphometry study.
abstract: The origin of the high rate of depression in idiopathic Parkinson's disease (PD) is unknown. We applied voxel-based morphometry (VBM), as a sensitive tool in detection of gray matter MR density alterations, to find differences in depressed and nondepressed PD patients. Patients with idiopathic PD were classified into depressed (DPD) and nondepressed (NDPD) groups based on the Montgomery-Asberg Depression Rating Scale (MADRS). Subsequently, a group comparisons were performed between depressed PD (n = 23), nondepressed PD (n = 27) and normal healthy controls (NC, n = 16). There was no difference in gray matter density comparing healthy controls to any PD groups. However, when NDPD and DPD cohorts were compared, density alteration of the bilateral orbitofrontal, bilateral rectal gyrus, and also the right superior temporal pole was detected in the depressed subgroup. Exploratory analyses revealed an inverse correlation of MADRS scores and severity of VBM alteration in these regions beside the right medial temporal gyrus, anterior and medial cingular gyrus, and parahippocampal gyrus. These results suggest that depression in PD is related to gray matter decrease in the bilateral orbitofrontal and right temporal regions as well as the limbic system.
authors.affiliation: Department of Neurology, University of Pécs, Hungary. adam.feldmann@aok.pte.hu
authors.forename: Adam
authors.initials: A
authors.lastname: Feldmann
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Illes
authors.forename: Peter
authors.initials: P
authors.lastname: Kosztolanyi
authors.forename: Eniko
authors.initials: E
authors.lastname: Illes
authors.forename: Andrea
authors.initials: A
authors.lastname: Mike
authors.forename: Ferenc
authors.initials: F
authors.lastname: Kover
authors.forename: Istvan
authors.initials: I
authors.lastname: Balas
authors.forename: Norbert
authors.initials: N
authors.lastname: Kovacs
authors.forename: Ferenc
authors.initials: F
authors.lastname: Nagy
mesh_terms: D001008:Anxiety Disorders / Q000175:diagnosis / Q000453:epidemiology; D002421:Caudate Nucleus / Q000098:blood supply / Q000378:metabolism / Q000473:pathology; D002452:Cell Count; D002560:Cerebrovascular Circulation / Q000502:physiology; D003072:Cognition Disorders / Q000175:diagnosis / Q000453:epidemiology; D003865:Major Depressive Disorder / Q000175:diagnosis / Q000209:etiology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010300:Parkinson Disease / Q000453:epidemiology / Q000378:metabolism / Q000523:psychology*; D049268:Positron-Emission Tomography; D017397:Prefrontal Cortex / Q000098:blood supply / Q000378:metabolism / Q000473:pathology; D012720:Severity of Illness Index