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>> like someone responds right away, yeah, they responded. if they respond two to three hours later, what's going on? >> reporter: sounds addictive? could be. the instant gratification of getting a text back floods the brain with dope amean. >> those kids that are texting have the area light up the same as an addict using heroin. they describe when i don't have it, i feel bad or anxious or sad. >> reporter: like the new nicotine? >> that's a good description, yeah, for many it may well be. >> reporter: this brain doctor treats teens with sleeping disorders and discovered one out of five them a...

>> they have the area of the brain light up the same as an addict using heroin. they will describe when i don't have it, i feel bad. i feel anxious or sad. >> it's like the new nicotine. >> that's a good description. for many it may well be. >> reporter: brain doctor treats teens with sleeping disorders hat this clinic. he's discovered one out of five of them are interrupting their sleep to text, triggering problems. >> with lack of sleep, they are having a problem performing. they're going from honor roll students to barely passing. >> reporter: that's the worst case. these teens on the other...

Dope mean. >> studies have shown that the kids texting have that area of the brain light up the same as an addict using heroin and they will actually describe when i don't have it i feel bad, i feel anxious or sad. >> reporter: it is like the new neek teen? >> reporte >> that's a good description. >> reporter: brain doctor michael cipher treats teens with sleeping disorders and discovered one out of five of them are interrupting the sleep to text triggering problems. >> with a lack of sleep, they're having a problem performing, going from "a" or honor roll students to barely passing. >> report...