[Morphometric analysis of epitheliocytes in the choroid plexus of brain ventricles in rat ontogenesis].

Light and dark epitheliocytes of choroid plexus were studied by morphometric methods in lateral and III ventricle of rat's brain during development. Investigations were performed on semithin sections using point-counting method with combined ocular test-system for linear and planimetric measurements. The results obtained suggest that light and dark choroid plexus epitheliocytes complete their differentiation by postnatal day 30.