1984
DOI: 10.1113/jphysiol.1984.sp015343
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Absorption of the cerebrospinal fluid and intracranial compliance in an amphibian, Rana pipiens.

Abstract: Experiments have been carried out to investigate the absorption of the cerebrospinal fluid (c.s.f.) and the intracranial compliance in an amphibian, Rana pipiens, using infusions into the c.s.f. system through glass micropipettes. Resistance to absorption of the c.s.f. was estimated by the constant rate infusion technique. Mean absorption resistance for infusions of artificial c.s.f. into the lateral ventricles and into the cerebral subarachnoid space were 15.48 and 16.52 mmH2O min microliter‐1 respectively. T… Show more

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Cited by 12 publications
(2 citation statements)
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“…The presence of an effective BBB in adult frogs is well documented structurally 33 34 and functionally 35 36 37 38 . However, it is not clear how early during the amphibian development the BBB matures and how efficiently it functions in anuran tadpoles.…”
Section: Discussionmentioning
confidence: 99%
“…The presence of an effective BBB in adult frogs is well documented structurally 33 34 and functionally 35 36 37 38 . However, it is not clear how early during the amphibian development the BBB matures and how efficiently it functions in anuran tadpoles.…”
Section: Discussionmentioning
confidence: 99%
“…In amphibians, the internal and external CSF compartments are connected by a unique system of microscopical pores in the roof of the fourth ventricle (Jones, 1979;Tornheim and Michaels, 1979). Although CSF absorption sites have not been positively identified in amphibians, there is a rapid appearance in blood of radiolabelled substances infused into the CSF, with the concentration being higher in venous than in arterial blood (Jones and Taylor, 1984), suggesting the existence of a direct route into dural veins as occurs in mammals. At variance, the principal exit routes of tracer injected into the brain ventricles of elasmobranchs are along the cranial nerves and the central canal of the spinal cord (Davson and Segal, 1996;Oppelt et al, 1966).…”
Section: Csf Absorptionmentioning
confidence: 99%