Narrow-Field Amacrine Cells Mediate OFF Signals Between B2 Bipolar and Ganglion Cells in the Mouse Retina
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A rod-cone mixed input type of OFF bipolar cell (B2) comprises the third rod signal pathway in the mouse retina . The B2 cell receives cone input at basal contacts and also rod input at symmetrical contacts that express ionotropic glutamate receptors . Only one fifth of all rod terminals have direct contacts with B2 cell dendrites, but such rod members gather signals from neighboring rods through rod-rod gap Junctions. This third pathway explains the rod responses that persist in OFF ganglion cells after blockage of the other pathways .
Key wordsMouse retina Amacrine cell Microcircuitry
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