Golgi-like staining of neocortical neurons using retrogradely transported horseradish peroxidase.

Neocortical pyramidal neurons stained solidly with horseradish peroxidase (HRP) two days after striatal, thalamic or cortical HRP injections are described in the rabbit, rat and marmoset monkey. The dendritic detail seen in these solid HRP-labeled neurons approaches that produced by the Golgi method.