A recent randomized, double-blind study found that 20 minutes of non-invasive brain stimulation on consecutive 4 days helps to improve working memory and long-term memory in people over 65 years old.

Researchers used a wearable cap with low- and high frequency electrode activity to stimulate the brain of 150 participants. Low frequency electode activity aimed to stimulate the parietal cortex of the brain. On the other hand, high frequency electrode activity targeted the prefrontal cortex of the brain.

As a result of the brain stimulation, low-frequency electrode activity improved working memory on day 3 and day 4, while high-frequency improved long-term memory on days 2–4. The improvement of both working and long-term memory lasted for at least 1 month. Researchers highlight that 4 consecutive days of stimulation for 20 minutes were the key to achieve these long-lasting results.

It is worth mentioning that the participants with lower cognitive function had larger, more enduring memory improvements.

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