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Inner S-cone bipolar cells provide all of the central elements for S cones in macaque retina by Steve Herr; Karl Klug; Peter Sterling; Stan Schein is a Neuroscience article available to read on EtoBox.

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## Abstract Synaptic terminals of cones (__pedicles__) are presynaptic to numerous processes that arise from the dendrites of many types of bipolar cell. One kind of process, a __central element__, reaches deeply into invaginations of the cone pedicle just below an active zone associated with a synaptic ribbon. By reconstruction from serial electron micrographs, we show that L‐ and M‐cone pedicles in macaque fovea are presynaptic to ∼20 central elements that arise from two types of __inner__ (invaginating) bipolar cell, midget and diffuse. In contrast, S‐cone pedicles, with more synaptic ribbons, active zones/ribbon, and central elements/active zone, are presynaptic to ∼33 central elements. Moreover, all of these arise from __one__ type of bipolar cell, previously described by others, here termed an __inner S‐cone bipolar cell__. Each provides ∼16 central elements. Thirty‐three is twice 16; correspondingly, these bipolar cells are twice as numerous as S cones. (Specifically, each S cone is presynaptic to four inner S‐cone bipolar cells; in turn, each bipolar cell provides central elements to two S cones.) These bipolar cells are presynaptic to an equal number of small‐field bistrat

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Author

Steve Herr; Karl Klug; Peter Sterling; Stan Schein

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley; Research Square (ISSN 0021-9967)

Published

2003

Language

EN

Field

Neuroscience (Life Sciences)