title: Day-night variation of urine volume in Parkinson's disease.
abstract: Studies on the circadian rhythm of urine excretion in healthy men have demonstrated that the maximal urine flow occurs in the early afternoon and the minimal around midnight. In this study, an abnormality in the variation of urine volume was found in parkinsonian patients. Urine samples were collected during daytime (9:00-21:00) and nighttime (21:00-9:00). Fifteen healthy control subjects were examined and found to excrete 60% during the daytime and 40% during the nighttime of the total urine volume. Sixteen parkinsonian patients excreted 43% during the daytime and 57% during the nighttime. In contrast to the control subjects, the parkinsonian patients excreted a smaller volume of their urine during the daytime than during the nighttime. This finding might be related to the degeneration of dopaminergic and/or nondopaminergic neurons in the brain which control urinary excretion.
authors.affiliation: Department of Neuropsychiatry, Ehime University School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Hineno
authors.forename: M
authors.initials: M
authors.lastname: Mizobuchi
authors.forename: O
authors.initials: O
authors.lastname: Nishimatsu
authors.forename: J
authors.initials: J
authors.lastname: Horiguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Kakimoto
mesh_terms: D000328:Adult; D000368:Aged; D000547:Amantadine / Q000627:therapeutic use; D001971:Bromocriptine / Q000627:therapeutic use; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D007980:Levodopa / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000188:drug therapy / Q000652:urine*; D013997:Time Factors; D014282:Trihexyphenidyl / Q000627:therapeutic use; D014556:Urine
chemical_list: D001971:Bromocriptine; D007980:Levodopa; D014282:Trihexyphenidyl; D000547:Amantadine