A reconstruction of three neurons that span the mouse brain. MOUSELIGHT PROJECT TEAM, JANELIA RESEARCH CAMPUS Mapping different neurons in the mouse brain is challenging, as many of them form complex tracts that wind throughout the tissue. Scientists from Janelia Research Campus have succeeded in visualizing 300 of the nearly 70 million neurons in the mouse brain. They showed that some of them even grow into fibers nearly half a meter long. Las week, they released their data along with a freely available analysis tool—the MouseLight Neuronbrowser.
Image of the Day: Neurons Unveiled
Researchers have succeeded in mapping the complex paths of 300 neurons in the mouse brain.

