[Quantitative changes in piriform neurons of human cerebellar cortex from birth to 20 years].

Age changes of size parameters of piriform (Purkinje) neurons in visual cerebellar cortex (pyramid and lateral areas of right and left digastric lobes) were studied at monthly intervals (during the first postnatal year) and at annual intervals (since birth up to 20 yrs) using computer optic image analyzer. Postnatal development of piriform neurons from human cerebellar visual cortex was found to be periodic (cyclic); each morphological cycle is characterised by certain duration and a series of quantitative and qualitative changes.