morphological changes observed in the cerebellum , retina , and optic nerve of treated animals during the fourth to twenty-first days of life consist of regional reduction in the size of cerebellar vermis lobules iv , v , via , and ix , 35 to 40 % reduction in thickness of the molecular layer , accumulation of cerebellar external granular cells and retinal neuroblastic cells , fewer parallel fibers in the cerebellar cortex , and fewer myelinated axons in the optic nerve .
C0007765
cerebellar
C0007759
cerebellar cortex