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. 2023 Feb 4;24(4):3126. doi: 10.3390/ijms24043126

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Diagram illustrating the site of action of injected agents generating Oscillatory Potentials. Schematic representation of the reciprocal excitatory/inhibitory synapses between Rod Bipolar Cell (RBC) axon terminal and AII, and A17 amacrine cells extracted from Figure 1 and Oscillatory Potential traces extracted from Figure 2 shows the site of action (arrows) of injected drugs and the effect on Oscillatory Potentials. Grey traces correspond PBS injected eyes and colored traces correspond to drug-injected eyes (red = abolishing OP; yellow = partially reducing OP; green = not affecting OP). Intravitreally injected Glutamate (Glut) and DNQX act on GluR expressed by AII and A17 cell processes. GABA, Bicuculline (Bic), and TPMPA act on GABA_AR and GABA_CR expressed by RBC axon terminal. Glycine (Gly) and Strychnine (Str) act on GlyR expressed by RBC axon terminal. AII: type II amacrine cell; A17: type 17 amacrine cell; GlyR: Glycine Receptor; GluR: Glutamate Receptor; GABA_AR: GABA_A Receptor; GABA_CR: GABA_C Receptor.