Prefrontal Cortex Lacks Age-25 Deadline

The popular claim that the prefrontal cortex becomes fully developed at age 25 is a myth. One frequently cited origin involves neuroscientist Jay Giedd, whose brain-imaging research stopped following participants around ages 18 to 20 while their brains were still developing; he later speculated that researchers might need to continue until 25. Research confirms that the prefrontal cortex develops more slowly than many other regions, but it reveals no sudden cutoff or change in executive function at 25. Brain development continues throughout life, while different cognitive abilities mature at different rates.

Previous Fact Next Fact