Studies of the maturation of the visual system of the albino mouse.

The maturation of the albino mouse visual system was studied using mainly the retinae and visual cortices. Increased proportion of ganglion cells was detected in the central region of the retinae of 4 month old animals. The relative thickness of layer 4 of the visual cortex also reached a high in the 4 month old mouse. These results were further strengthened by detection of an increase in the spicules on the dendrites of stellate cells in layer 4 of the cortex concomitant with an increase in GABA and Noradrenaline uptake in the visual cortex. All that appeared to point to that the visual system of the albino mouse reached maturation when they were 4 months old.