A team of researchers at The Rockefeller University, working with a colleague from Fudan University, has found the neuron clusters in the mouse brain that regulate illness symptoms. In their paper published in the journal Nature, the group describes the multi-stage process they conducted to locate the nerve bundles and why finding them could be important. Amirah-Iman Hicks and Masha Prager-Khoutorsky with McGill University, have published a News & Views piece in the same journal issue outlining the work.