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Home Q & A Board Science-Related Homework Help Psychology
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k_deshotels k_deshotels
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6 years ago
Contrast efferent and afferent tracing procedures.
 
  What will be an ideal response?
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6 years ago
Answer: In the efferent tracing procedure, a chemical such as PLA is injected into a brain site, taken up by dendrites and transported out to the axons. Immunocytochemistry is used to visualize the places that receive axons from the neurons of the injection site. In contrast, afferent tracing involves injecting a chemical, such as fluorogold, which is taken up by axon terminal buttons and transported backwards to the cell bodies. This procedure thus identifies the neurons that innervate a specific brain region.
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