Individual nerve cells are obscured in the dense, forest-like geography of the brain. Unlike blood cells, for example, which are solitary travelers and can thus be easily captured and studied in isolation, the nerve cells (or neurons) of the brain conceal their identities among a thicket of similar-looking, but functionally diverse neighbors. Developed by new Ó³»´«Ã½ core member Myriam Heiman during her postdoctoral studies at The Rockefeller University, a methodology called TRAP is designed to catch single types of neurons and reveal what makes them different from their neighbors.