An anterograde HRP study of the retinotectal pathways in albino and pigmented guinea pigs.

An uncrossed retinotectal projection was observed in albino guinea pigs using the anterograde HRP method, suggesting that the retinal projection in these animals, similar to that in the pigmented strain, is not strictly crossed as reported previously. It was also noted that a small retinal projection terminated in a restricted region in the most medial portion of the contralateral inferior colliculus, implying that it might be influenced directly by fibers arising from the contralateral eye.