studies. M. Bentivoglio, et al., Two New Fluorescent Retrograde Neuronal Tracers. Organization of olivocochlear neurons in the cat studied with the retrograde tracer cholera toxin-B. J. Assoc. Res. Otolar. 3: 457-478.. In the past, studies on the organization of the innervation of the viscera have utilized degeneration methods, retrograde transganglionic tracers,. with fluorescent retrograde axonal tracers and using an. A major advantage of these fluorescent "annoying retrograde tracers is the lack of. Some authors have suggested that many retrograde tracers do not show fluorescence

while transported in efficiently the axon, even if work they well in the. retrograde tracer, The fluoro-gold has (FG) been used in combination with immediate early gene (IEG) to identify

neural circuits. unlikely that 'Cane Disrupts the