Peripheral to Central, a tool for dissecting the motor output circuits - PRV
Rabies Virus Retrograde Monosynaptic Tracing System: A useful tool for studying input circuits
HSV and VSV are effective tools for studying the output neural circuit from a structural perspective
HSV anterograde mono-synaptic tracing system: studying specific brain regions and neuronal types' anterograde monosynaptic output neural circuits
Using viral vectors to study the inputs and outputs of neurons is the most important approach to elucidating the structure of neural circuits.