Implications of Myelin in Executive Control in Adolescence and Early Adulthood

The Myelex study is a fundamental research study that aims to better understand how the brain functions and develops. The objective of this study is to better understand the role of myelin, a sheath that surrounds nerve fibers and determines the speed of information propagation in the brain, in cognitive functioning during development in adolescents and young adults. investigator use Magnetic Resonance Imaging (MRI) because this method allows us to study the anatomy and functioning of the brain in a non-invasive (no injection) and painless manner. investigator focus on cognitive control, a set of cognitive functions in the prefrontal cortex, at the front of the brain, that enable the use of the best strategies on a case-by-case basis to solve problems effectively. These functions are closely associated with academic and professional success and develop late, continuing until early adulthood. The goal of this project is simple: to measure the myelin of nerve fibers using MRI and to evaluate the link with the development of cognitive control. Each participant will undergo an MRI examination and cognitive assessments. The study takes place at the Clinical Research Center of GHU Paris and lasts a total of 3.5 hours, including reception, setup, MRI recording, and the completion of a series of cognitive tasks.