Skip to Content
77 Mass Ave

Finding focus

People can increase their attention by controlling certain brain waves.
April 15, 2020

Having trouble paying attention? MIT neuroscientists may have a solution: turn down your alpha brain waves. In a recent study, subjects who used neurofeedback to suppress alpha waves in one hemisphere of their parietal cortex were able to pay better attention to objects that appeared on the opposite side of their visual field.

“There’s a lot of interest in using neurofeedback to try to help people with various brain disorders and behavioral problems,” says Robert Desimone, director of MIT’s McGovern Institute for Brain Research, who led the study. “It’s a completely noninvasive way of controlling and testing the role of different types of brain activity.”

Subjects were asked to use mental effort to increase the contrast in a grating pattern at the center of a screen while being scanned with magnetoencephalography (MEG), which reveals brain activity with millisecond precision. The greater the asymmetry between alpha levels in the left and right hemispheres of the parietal cortex, which is involved in attention, the more visible the pattern became, offering real-time feedback.

Although subjects were not told what was happening, after about 20 trials they were able to increase the contrast. The MEG results indicated they had done so by dampening alpha waves in one hemisphere. Experimental tasks they performed after the training showed that they paid more attention to activity in the side of the visual field opposite that hemisphere.

“After the experiment, the subjects said they knew that they were controlling the contrast, but they didn’t know how they did it,” says McGovern Institute postdoc Yasaman Bagherzadeh, the study’s first author. She believes the feedback enabled them to learn by practicing.

Keep Reading

Most Popular

This startup wants to copy you into an embryo for organ harvesting

With plans to create realistic synthetic embryos, grown in jars, Renewal Bio is on a journey to the horizon of science and ethics.

VR is as good as psychedelics at helping people reach transcendence

On key metrics, a VR experience elicited a response indistinguishable from subjects who took medium doses of LSD or magic mushrooms.

This nanoparticle could be the key to a universal covid vaccine

Ending the covid pandemic might well require a vaccine that protects against any new strains. Researchers may have found a strategy that will work.

Stay connected

Illustration by Rose Wong

Get the latest updates from
MIT Technology Review

Discover special offers, top stories, upcoming events, and more.

Thank you for submitting your email!

Explore more newsletters

It looks like something went wrong.

We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at customer-service@technologyreview.com with a list of newsletters you’d like to receive.