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The retinal projection to the cat pretectum

Retinal ganglion cells were labeled retrogradely by localized injections of HRP into different regions of the pretectum, tectum, and optic tract in 26 cats. Retinal projection zones in the pretectum were labeled anterogradely in the same cats by intravitreal injections of 3H‐proline. This allowed the HRP injection sites to be located with respect to the retinal termination zones.