O que realmente sabemos sobre o cérebro PHDA

Brain imaging studies have focused on ADHD for about 25 years. What do we truly know? Not as much as we had hoped, but we have learned a few real lessons. First, overall brain development is almost completely indistinguishable from typical, healthy brain development. However, on average, individuals with ADHD have slightly smaller brain volumes than those without ADHD. This slight decrease in volume is also detected when we measure the thickness of the cerebral cortex. Furthermore, measuring the thickness of the cortex over time in the same children taught us that one of the most important differences among individuals with ADHD and non-ADHD comparison individuals is in the rate of development of maturational processes. These are delayed by 3 to 5 years in individuals with ADHD, particularly in the frontal lobes. Functional imaging studies are also detecting evidence of delayed maturation. Studies conducted without a specific task, called resting-state, are also revealing differences in how brain networks relate to each other. So we do not yet understand how the brain functions differently in ADHD, but recent initiatives and technological advances suggest that we are about to learn much more in the next decade.

 

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