A new development finds that children with ADHD have weaker interactions between three brain networks that help people pay attention.

The study examined 180 children, half of whom had ADHD and half of whom did not. The team of researchers examined how the salience network interacted with the other two brain networks. The salience network is responsible for shutting down functions such as daydreaming while completing a task. "This network’s ability to regulate interactions with other brain systems is weaker in kids with ADHD," study author says.

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