Laser light rewrites memories in mice
Nerve cells in the hippocampus help the brain modify recollections
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/08/ls_memory_feat.png?fit=860%2C460&ssl=1)
ALTERED Mice’s bad memories turned into good ones and vice versa with a flash of light. The switch occurred when nerve cells (red) storing the memory were activated while a mouse experienced something new. The black region (center) shows the location of the light-delivering optical fiber.
R. Redondo