An easy and convenient method to determine the extent of gap junction tracer coupling between retinal neurons is described. This technique enables one to investigate the function of the electrical synapses between neurons in the intact retina under different illumination conditions and at different times of the day and night.
Choi, H. J., Ribelayga, C. P., Mangel, S. C. Cut-loading: A Useful Tool for Examining the Extent of Gap Junction Tracer Coupling Between Retinal Neurons. J. Vis. Exp. (59), e3180, doi:10.3791/3180 (2012).