The Teen Brain: It’s Just Not Grown Up Yet
March 01, 2010
“It’s the part of the brain that says: ‘Is this a good idea? What is the consequence of this action?’ ” Jensen says. “It’s not that they don’t have a frontal lobe. And they can use it. But they’re going to access it more slowly.”
That’s because the nerve cells that connect teenagers’ frontal lobes with the rest of their brains are sluggish. Teenagers don’t have as much of the fatty coating called myelin, or “white matter,” that adults have in this area.
a teenager who smokes pot will still show cognitive deficits days later. An adult who smokes the same dose will return to cognitive baseline much faster.