[Dynamical study of cerebrospinal fluid at the spinal level during isotopic cisternography. 74 cases].

Physiology teaches that in addition ot be basic areas of C.S.F. resorption in the region of the cerebrum, supplementary zones exist situated in particular at the coverings of the spinal nerves. The aim of this study was a quantitative and dynamic analysis of spinal flow in 74 subjects, 64 of whom had clinical signs of communicating hydrocephalus. In certain of them, classical examinations provided no precise indications as to the appropriate neurosurgical procedure. Study of the dynamics and resorption of the C.S.F. in the spine would appear to provide new elements in assessment prior to the decision to insert a ventriculo-atrial valve.