[Physiological and anatomical study of the retinogeniculate projections in the mouse]

A physiological and anatomical study of the dorsal lateral geniculate nucleus (dlGn) in pigmented C57BL/6 Mice is reported. Neurons responding to the ipsilateral eye are clustered in a region near the medial border of dlGn, and are surrounded by contralateral neurons. Electrode penetrations in this part of dlGn show the existence of contra/ipsi/contralateral projection lines. Practically only the contralateral field of vision is represented in each dlGn. Local HRP injections show evidence in the retina of a decussation line for contralateral retinogeniculate projections, the border of which follows the inner border of the region of ipsilateral projection. The mean diameter of ipsilateral retinogeniculate ganglion cells is larger than that of contralateral cells.