Dim Light My Change Brain Structure and Hurt Memory

Dim light may change brain structure and hurt memory, a recent study suggests. It’s not a good idea to regularly stay in dimly-lit rooms as it can negatively affect the functioning of the brain.


A recent study claims that dim light may change brain structure and impair a person’s ability to learn and remember.

For the findings, Joel Soler, and colleagues from Michigan State University (MSU), studied the brains of Nile grass rats because they are just like humans. The study was published in the journal Hippocampus.

The researchers exposed the rodents to dim and bright lights over a period of four weeks. After that, they found that one group of rats exposed to dim light lost 30 percent of capacity in their hippocampus- the brain’s region which plays an important role in learning and memory. The animals that were exposed to bright light showed significant improvement in spatial task. After spending four weeks in bright light, the first group of rats recovered their brain capacity fully.

Joel Soler explained that this happened because of the link of the intensity of light with the brain-derived neurotrophic factor and the dendritic spines.

Soler and colleagues said, “A mechanistic understanding of the effects of light on cognition can help to identify risk factors for cognitive decline and contribute to the development of more effective prevention and treatment of cognitive impairment in clinical populations.”

The research results showed that light intensity does not only impact cognitive performance, but it also affects hippocampal structural plasticity, according to the researchers.



Share this post