[X-ray computed tomography of intracranial fluid cavities in the infant (ventricles, the interhemispheric fissure and pericerebral spaces)].

The brain of 102 infants with an age range of 0,5-22 months was examined with computed tomography (C.T.). The main indications for C.T. investigations were psychomotor retardation or seizures. There were 70 infants with an increase of the volume of intracranial cerebrospinal fluid characterized by -a pericerebral effusion with a thickness from 1-14 mm -a dilatation of interhemispheric fissure -and most frequently an internal hydrocephalus. This phenomenon and his spontaneous remission suggested, that if arachnoïd will are observed in new-born infants, they increased in complexity with normal function as development proceeded.