ADHD: Brain structure

0
11KB

 
The left prefrontal cortex, shown here in blue, is often affected in ADHD.
In children with ADHD, there is a general reduction of volume in certain brain structures, with a proportionally greater decrease in the volume in the left-sided prefrontal cortex.The posterior parietal cortex also shows thinning in individuals with ADHD compared to controls. Other brain structures in the prefrontal-striatal-cerebellar and prefrontal-striatal-thalamic circuits have also been found to differ between people with and without ADHD.

The subcortical volumes of the accumbens, amygdala, caudate, hippocampus, and putamen appears smaller in individuals with ADHD compared with controls. Structural MRI studies have also revealed differences in white matter, with marked differences in inter-hemispheric asymmetry between ADHD and typically developing youths.

Function MRI (fMRI) studies have revealed a number of differences between ADHD and control brains. Mirroring what is known from structural findings, fMRI studies have showed evidence for a higher connectivity between subcortical and cortical regions, such as between the caudate and prefrontal cortex. The degree of hyperconnectivity between these regions correlated with the severity of inattention or hyperactivity. Hemispheric lateralization processes have also been postulated as being implicated in ADHD, but empiric results showed contrasting evidence on the topic.

Pesquisar
Categorias
Leia mais
Business
How Should I Prepare for a Mentoring Session?
Effective mentoring sessions don’t happen by chance—they require thoughtful...
Por Dacey Rankins 2025-05-24 15:43:34 0 5KB
Социальные проблемы
Однажды в Америке. Once Upon a Time in America. (1984)
В бурные двадцатые годы, когда Америка веселилась под звуки джаза, и каждый бродяга мечтал стать...
Por Nikolai Pokryshkin 2023-01-04 15:21:05 0 23KB
News and Media
Exclusive most reputable scientific journals in the world
Which scientific journals are the most popular and widespread in the world? Which magazines are...
Por FWhoop Xelqua 2023-04-17 18:07:42 0 19KB
Жизненные вопросы
Гран Торино. Gran Torino. (2008)
Вышедший на пенсию автомеханик Уолт Ковальски проводит дни, починяя что-то по дому, попивая пиво...
Por Nikolai Pokryshkin 2023-03-13 18:57:52 0 28KB
Business
Starting a Business: A Step-by-Step Guide
Starting a business can be an exciting yet challenging endeavor. Whether you're pursuing your...
Por Dacey Rankins 2024-12-16 13:55:43 0 11KB

BigMoney.VIP Powered by Hosting Pokrov