Novel technique helps explain why bright light keeps us awake

LA JOLLA?In recent decades, scientists have learned a great deal about how different neurons connect and send signals to each other. But it?s been difficult to trace the activity of individual nerve fibers known as axons, some of which can extend from the tip of the toe to the head. Understanding these connections is important for figuring out how the brain receives and responds to signals from other parts of the body.

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