I’ve been told that the white matter in a brain is fully developed at 20, the gray matter at 8. Why do they say the prefrontal cortex isn’t developed until about 25?

Question

What is there left to develop at 25 if the gray and white matter is done by the time you’re 20ish?

In: 7

Answer 1

The VOLUME is fully grown but it’s not fully developed. Think of a lanky teenager, he’s not going to get taller but he’s not really fully grown till later.