Comment le cerveau se recâble : neuroplasticité, mémoire et mode de vie
Le cerveau n'est pas un organe figé : sa structure, sa connectivité et même sa taille répondent de manière mesurable à la façon dont nous bougeons, dormons, apprenons et gérons le stress. Comprendre les mécanismes de la neuroplasticité ouvre des voies pratiques et fondées sur des données probantes pour préserver et améliorer la fonction cognitive tout au long de la vie.
Créé avec l'IAL'idée que le cerveau adulte est statique, enfermé dans une architecture fixe après le développement précoce, a été substantiellement révisée par la recherche en neurosciences. Des structures autrefois considérées comme immuables peuvent croître ou rétrécir en réponse au comportement, à la nutrition et à la pratique mentale. Pour les cliniciens comme pour les individus, cela signifie que la trajectoire cognitive n'est pas simplement une question de génétique ou de vieillissement, mais est façonnée de manière significative par des apports quotidiens modifiables.
Créé avec l'IAL'hippocampe peut croître ou rétrécir selon le mode de vie
Le neurologue Dr. Majid Fotuhi, s'exprimant avec Dave Asprey, soutient que l'hippocampe, le principal centre de la mémoire dans le cerveau, est l'une des structures les plus plastiques du cerveau adulte. De la taille approximative d'un pouce, il peut s'étendre ou se contracter selon les stimuli qu'il reçoit. Le Dr. Fotuhi, qui a rédigé un article dans Nature identifiant plus d'une douzaine de facteurs modifiables, note qu'un hippocampe plus grand est corrélé à un risque plus faible d'Alzheimer, tandis qu'un hippocampe plus petit est associé à un déclin cognitif plus précoce.
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