Connectivity Map of Bipolar Cells and Photoreceptors in the Mouse Retina

Overview

Journal Elife

Specialty Biology

Date 2016 Nov 26

PMID 27885985

Citations 97

Authors

Christian Behrens

Timm Schubert

Silke Haverkamp

Thomas Euler

Philipp Berens

Affiliations

Soon will be listed here.

Abstract

In the mouse retina, three different types of photoreceptors provide input to 14 bipolar cell (BC) types. Classically, most BC types are thought to contact all cones within their dendritic field; ON-BCs would contact cones exclusively via so-called invaginating synapses, while OFF-BCs would form basal synapses. By mining publically available electron microscopy data, we discovered interesting violations of these rules of outer retinal connectivity: ON-BC type X contacted only ~20% of the cones in its dendritic field and made mostly atypical non-invaginating contacts. Types 5T, 5O and 8 also contacted fewer cones than expected. In addition, we found that rod BCs received input from cones, providing anatomical evidence that rod and cone pathways are interconnected in both directions. This suggests that the organization of the outer plexiform layer is more complex than classically thought.

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