Bifurcation of subcortical afferents to visual areas 17, 18, and 19 in the cat cortex

We have examined the pattern of axon bifurcation in the thalamic and claustral afferents to visual areas 17, 18, and 19 in the adult cat neocortex. This was achieved by injecting two fluorescent retrograde tracers, fast blue and diamidino yellow, in retinotopically corresponding regions of two of these three cortical areas. The pattern of single‐ and double‐labelled cells was then examined in subcortical structures and the presence of double‐labelled cells was interpreted as indicating that these neurons send bifurcating axons to the two injected areas.

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