As for their actual brain, the brain scans showed that high-scoring participants experienced greater activation of their amygdala and striatum, the two brain regions involved in impulsive behavior. These patterns are on par with those who are addicted to cocaine. However, unlike drug addicts, “the brain regions that inhibit this behavior seem to work just fine.”
Even so, Live Science reported this study was limited. It involved a small group of participants with relatively low levels of Facebook “addiction,” and it may not be ideal toward this investigation into increased online use. Instead, other experts suggested “addiction” is likely a combination of "biological, psychological, social, and cultural factors.