Third Visual Pathway, Anatomy, and Cognition across Species

Published on May 21, 2021

Pitcher and Ungerleider [1] proposed extending the two visual pathway model to include a third visual pathway (TVP) for social perception. The TVP is consistent with the lateral stream as previously referenced in the human neuroimaging literature [2–4] (Figure 1). The authors use a variety of evidence in support of the TVP, including examples of homology between human and macaque. Although we agree with their general proposal of the TVP, we offer additional anatomical and functional findings that suggest differences in the TVP between species and in the functional roles of the TVP beyond social perception.

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