Dr. Smith would be better to say, as she looks at these brains every day. But essentially, it's generally understood that it's between ages 25 and 28—and Dr. Smith, come in here—but my understanding is that in some people, the prefrontal cortex does not fully develop until even age 40. But I think the average understanding would be 25 to 28 years for the development of the brain, yes.
On May 6th, 2014. See this statement in context.