Retinotopic organization of feedback projections in primate early visual cortex: implications for active vision
2022
Wang, Mingli | Hou, Yujie | Magrou, Loïc | Autio, Joonas, A | Misery, Pierre | Coalson, Tim | Reid, Erin | Xu, Yuanfang | Lamy, Camille | Falchier, Arnauld | Zhang, Qi | Poo, Mu-Ming | Dehay, Colette | Glasser, Matthew, F | Hayashi, Takuya | Knoblauch, Kenneth | van Essen, David | Shen, Zhiming | Kennedy, Henry | State Key Laboratory of Cognitive Neuroscience and Learning ; Beijing Normal University (BNU) | Institut cellule souche et cerveau / Stem Cell and Brain Research Institute (SBRI) ; Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | RIKEN Center for Biosystems Dynamics Research [Kobe] (RIKEN BDR) ; RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN) | Washington University in Saint Louis (WUSTL) | Nathan Kline Institute | Graduate School of Medicine and Faculty of Medicine Kyoto University | University of South-Eastern Norway (USN)
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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