Bright Lights Vs. Dim Lights Graphic (IMAGE)

Michigan State University

Bright Lights Vs. Dim Lights Graphic

Caption

Nile grass rats exposed to dim lights (DLD) for four weeks experienced, on average, a 30 percent decrease in the number of 'dendritic spine' connections in their brains, which are the tiny protrusions near the solid green line, a dendrite. These rats performed poorly on a maze-like task. Rats exposed to bright light (BLD), on the other hand, had many more of the dendritic connections and showed superior performance on the task.

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Michigan State University

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