title: Brain morphometric abnormalities in geriatric depression: long-term neurobiological effects of illness duration.
abstract: OBJECTIVE
  The authors' goal was to compare regional brain volumes in depressed elderly subjects with those of nondepressed elderly subjects by using voxel-based morphometry.
  
  
  METHODS
  They used statistical parametric mapping to analyze magnetic resonance imaging scans from 30 depressed patients 59 to 78 years old and 47 nondepressed comparison subjects 55 to 81 years old.
  
  
  RESULTS
  Depressed patients had smaller right hippocampal volume than comparison subjects. The volume of the hippocampal-entorhinal cortex was inversely associated with the number of years since the first lifetime episode of depression.
  
  
  CONCLUSIONS
  These data provide further evidence of structural brain abnormalities in geriatric depression, particularly in patients with a longer course of illness.
authors.affiliation: Neuropsychology Research Program, Department of Psychiatry, University of Pittsburgh Medical Center, PA 15213, USA.
authors.forename: Sandra
authors.initials: S
authors.lastname: Bell-McGinty
authors.forename: Meryl A
authors.initials: MA
authors.lastname: Butters
authors.forename: Carolyn Cidis
authors.initials: CC
authors.lastname: Meltzer
authors.forename: Phil J
authors.initials: PJ
authors.lastname: Greer
authors.forename: Charles F
authors.initials: CF
authors.lastname: Reynolds
authors.forename: James T
authors.initials: JT
authors.lastname: Becker
mesh_terms: D000367:Age Factors; D017668:Age of Onset; D000368:Aged; D001921:Brain / Q000033:anatomy & histology*; D003866:Depressive Disorder / Q000175:diagnosis*; D018728:Entorhinal Cortex / Q000033:anatomy & histology; D005260:Female; D007839:Functional Laterality; D015577:Geriatric Assessment / Q000706:statistics & numerical data*; D006624:Hippocampus / Q000033:anatomy & histology; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000706:statistics & numerical data*; D008297:Male; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D013997:Time Factors