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Using multielectrode arrays, the researchers recorded the activity of thousands of neurons across three brain areas: the primary and midlevel visual cortices and the dorsolateral prefrontal cortex, which are associated with visual processing and executive functions.

The device's manufacturer Flow Neuroscience says it works by stimulating brain activity in the dorsolateral prefrontal cortex in the front of the brain, an area linked with depression.

The device works by stimulating brain activity in the dorsolateral prefrontal cortex in the front of the brain, an area linked with depression.

They found that highly hypnotizable people had stronger functional connectivity between the left dorsolateral prefrontal cortex, which is involved in information processing and decision making; and the dorsal anterior cingulate cortex, involved in detecting stimuli.

Specifically, they received two 46-second applications that delivered 800 pulses of electricity to a precise location in the left dorsolateral prefrontal cortex.