Video gamers at increased Alzheimer’s risk

Toronto

People who spend a long time playing video games could be at greater risk of developing mental disorders such as Alzheimer’s, a new study warns.

The study shows that while video game players (VGPs) exhibit more efficient visual attention abilities, they are also much more likely to use navigation strategies that rely on the brain's reward system (the caudate nucleus) and not the brain's spatial memory system (the hippocampus).

Past research has shown that people who use caudate nucleus-dependent navigation strategies have decreased grey matter and lower functional brain activity in the hippocampus.

Video gamers now spend a collective three billion hours per week in front of their screens. In fact, it is estimated that the average young person will have spent some 10,000 hours gaming by the time they are 21, researchers said.

The study was conducted among a group of adult gamers who were spending at least six hours per week on this activity.

"For more than a decade now, research has demonstrated that action video game players display more efficient visual attention abilities, and our current study has once again confirmed this notion," said first author Dr Gregory West, from the Universite de Montreal.

"However, we also found that gamers rely on the caudate-nucleus to a greater degree than non-gamers.

"Past research has shown that people who rely on caudate nucleus-dependent strategies have lower grey matter and functional brain activity in the hippocampus," said West.

"This means that people who spend a lot of time playing video games may have reduced hippocampal integrity, which is associated with an increased risk of neurological disorders such as Alzheimer's disease," West added.

Because past research has shown video games as having positive effects on attention, it is important for future research to confirm that gaming does not have a negative effect on the hippocampus.

The study was published in the journal Proceedings of the Royal Society B. — PTI