title: Cerebral laterality and depression: differences in perceptual asymmetry among diagnostic subtypes.
abstract: Examined the influence of diagnostic subtype of depression on perceptual asymmetry for dichotic listening and visual tachistoscopic tasks. A total of 65 unmedicated patients with major depressive disorders and 30 normal controls were tested on a verbal and nonverbal task in each modality. Patients diagnosed according to the DSM-III with melancholia had abnormal perceptual asymmetry for dichotic nonsense syllable and complex tone tasks. In contrast, patients having a nonmelancholic "atypical depression" (reactivity of mood with preserved pleasure capacity and associated features) did not differ from normal controls on these tasks, but had an increased incidence of left handedness. Bipolar depression (history of hypomania) differed from unipolar depression in showing abnormal perceptual asymmetry for a tachistoscopic dot enumeration task. Alterations of perceptual asymmetry in melancholia and bipolar depression were consistent with hypothesized right hemisphere dysfunction.
authors.forename: G E
authors.initials: GE
authors.lastname: Bruder
authors.forename: F M
authors.initials: FM
authors.lastname: Quitkin
authors.forename: J W
authors.initials: JW
authors.lastname: Stewart
authors.forename: C
authors.initials: C
authors.lastname: Martin
authors.forename: M M
authors.initials: MM
authors.lastname: Voglmaier
authors.forename: W M
authors.initials: WM
authors.lastname: Harrison
mesh_terms: D000293:Adolescent; D000328:Adult; D001307:Auditory Perception / Q000502:physiology*; D001714:Bipolar Disorder / Q000503:physiopathology*; D003866:Depressive Disorder / Q000503:physiopathology*; D004007:Dichotic Listening Tests; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D014796:Visual Perception / Q000502:physiology*