Viral tracers. Neuroscientists use viruses to map out pathways in the brain.
Leutwyler
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D000818:Animals; D001921:Brain / Q000033:anatomy & histology*; D006801:Humans; D009434:Neural Pathways / Q000033:anatomy & histology*; D009462:Neurology / Q000379:methods*; D014780:Viruses