Ipsilaterally projecting retinal ganglion cells in the eastern chipmunk (Tamias sibiricus asiaticus)

Ipsilaterally projecting ganglion cells were studied in whole-mounted retinas of the eastern chipmunk (Tamias sibiricus asiaticus) by labelling these cells with horseradish peroxidase (HRP) injected into the optic tract. The HRP-labelled cells were distributed exclusively in the temporal crescent which occupied about a quarter of the whole retinal area. The temporal crescent contained contralaterally projecting cells as well as ipsilaterally projecting cells. The soma size of ipsilaterally projecting cells, especially of those in the dorso-temporal crescent, was significantly larger than that of contralaterally projecting cells.