The dim light makes people stupid, is this true?

Release date: 2018-02-11 Source : arrogant LED network share:

According to a study published in the journal Hippocampus, long-term expectations of changing the structure of the brain in a dim environment can hurt our ability to remember and learn.

Researchers at Michigan State University, led by Dr. Lily Yan, studied the brain after exposing the African squirrel (Arvicanthis niloticus) to four weeks in dim light.

It was found that the important brain regions of learning and memory in the brain lost about 30% of their ability and did not perform well on the spatial tasks they had trained before.

On the other hand, animals exposed to bright light showed significant improvement in spatial tasks.

In addition, the brain volume and task performance of these grasses that were previously exposed to dim light were completely restored after four weeks of exposure to light.

Collaborator Professor Antonio Nunez said: "When we exposed the mice to dim light, imitating the cloudy winter in the Midwestern United States or the typical indoor lighting, these animals showed signs of damage in space learning."

“It’s like people who can’t find a car in a busy parking lot after spending a few hours in a shopping mall or movie theater.”

"Continuous exposure to dim light causes a significant reduction in a substance called brain-derived neurotrophic factor and dendrites (or neurons)."

“Because the number of neuronal connections is reduced, learning and memory are reduced. In other words, dim lighting makes people stupid.”

Interestingly, light does not directly affect the hippocampus (Note: the hippocampus is located between the cerebral thalamus and the medial temporal lobe, mainly responsible for the storage and orientation of long-term memory), which means that the light first acts on the brain after passing through the eye. Other parts within.

Dr. Lily Yan said: "We are studying a potential point in the brain of rodents, which is a group of neurons in the hypothalamus that produce a peptide called an orexin, which affects a lot. Brain function."

“One of our main research questions is: If the appetite peptide is given to mice that were previously exposed to dim light, their brains can recover without needing to be exposed to light again?”

The program may have an impact on older people, patients with glaucoma, retinal degeneration or cognitive impairment.

Dr. Lily Yan said: "Can we directly manipulate this group of brain neurons, bypass the eyes and provide them with the same benefits of light for those with no eye disease?"

“Another possibility is to improve the cognitive function of the elderly and people with neurological diseases. Can we help them recover from damage or prevent further decline?”

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