title: The cerebrospinal fluid production rate is reduced in dementia of the Alzheimer's type.
abstract: OBJECTIVE
  To evaluate the production rate of CSF in patients with differing disease states.
  
  
  METHODS
  The authors measured the production rate of CSF in three groups of patients: five patients with PD below age 60 (aged 51 +/- 4 years, mean +/- SD), nine with PD over age 60 (aged 69 +/- 6 years, mean +/- SD), and seven with dementia of the Alzheimer's type (AD) (aged 72 +/- 9 years, mean +/- SD). This method, based on the Masserman technique, employs ventricular rather than a lumbar access to the CSF space. Furthermore, the volume of CSF removed during the procedure is only 3 mL rather than 10 mL.
  
  
  RESULTS
  These measurements indicate that the mean rate of CSF production in patients with PD under age 60 was 0.47 +/- 0.13 mL/minute, in patients with PD aged 60 or older the mean rate was 0.40 +/- 0.12 mL/minute, and in patients with AD the mean rate was 0.20 +/- 0.06 mL/minute.
  
  
  CONCLUSIONS
  These results indicate that the rate of CSF production in patients with PD is normal, and that the rate of CSF production in patients with AD is markedly reduced.
authors.affiliation: Department of Neurosurgery, Stanford University School of Medicine, CA 94305-5327, USA. geralds@stanford.edu
authors.forename: G D
authors.initials: GD
authors.lastname: Silverberg
authors.forename: G
authors.initials: G
authors.lastname: Heit
authors.forename: S
authors.initials: S
authors.lastname: Huhn
authors.forename: R A
authors.initials: RA
authors.lastname: Jaffe
authors.forename: S D
authors.initials: SD
authors.lastname: Chang
authors.forename: H
authors.initials: H
authors.lastname: Bronte-Stewart
authors.forename: E
authors.initials: E
authors.lastname: Rubenstein
authors.forename: K
authors.initials: K
authors.lastname: Possin
authors.forename: T A
authors.initials: TA
authors.lastname: Saul
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000134:cerebrospinal fluid* / Q000175:diagnosis; D002555:Cerebrospinal Fluid / Q000502:physiology*; D003704:Dementia / Q000134:cerebrospinal fluid / Q000175:diagnosis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010300:Parkinson Disease / Q000134:cerebrospinal fluid / Q000175:diagnosis; D012016:Reference Values; D012636:Secretory Rate / Q000502:physiology