Retinotopic organization of feedback projections in primate early visual cortex: implications for active vision

Mingli Wang; Yujie Hou; Loïc Magrou; Joonas A. Autio; Pierre Misery; Tim Coalson; Erin Reid; Yuanfang Xu; Camille Lamy; Arnauld Falchier; Qi Zhang; Mu‐ming Poo; Colette Dehay; Matthew F. Glasser; Takuya Hayashi; Kenneth Knoblauch; David C. Van Essen; Zhiming Shen; Henry Kennedy

doi:10.1101/2022.04.27.489651

NeurosciencebioRxivApr 27, 2022

Preprint

Retinotopic organization of feedback projections in primate early visual cortex: implications for active vision

Mingli Wang iD, Yujie Hou iD, Loïc Magrou, Joonas A. Autio iD, Pierre Misery, Tim Coalson, Erin Reid, Yuanfang Xu, Camille Lamy iD, Arnauld Falchier, Qi Zhang iD, Mu‐ming Poo iD, Colette Dehay iD, Matthew F. Glasser iD, Takuya Hayashi iD, Kenneth Knoblauch iD, David C. Van Essen iD, Zhiming Shen iD, Henry Kennedy iD

Abstract

Feedback connections play a major role in many theories of brain function. Previous studies of feedback connections to early visual areas have mainly concentrated on the representation of central visual fields. Here, injections of tracers at different eccentricities in areas V1 and V2 revealed retinotopically organized feedback. Peripheral injections revealed projections from 15 areas that are not labeled by central injections. Connection strengths for the majority of projections vary significantly with eccentricity in a systematic fashion with respect to distance and origin; whereas projections to central and upper visual fields are significantly stronger from ventral stream areas, peripheral and lower field projections are stronger from the dorsal stream. Non-invasive functional connectivity suggests a similar anatomical organization in humans. These features are discussed with respect to the cognitive and perceptual roles of these feedback pathways.

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