ADHD: Brain structure

0
11χλμ.

 
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.

Αναζήτηση
Κατηγορίες
Διαβάζω περισσότερα
Социальные проблемы
Криминальное чтиво. Pulp Fiction. (1994)
Двое бандитов Винсент Вега и Джулс Винфилд ведут философские беседы в перерывах между разборками...
από Nikolai Pokryshkin 2022-11-04 18:47:33 0 30χλμ.
Business
What are some tips for making a business biography engaging?
Writing a business biography that resonates with readers goes beyond simply recounting events. A...
από Dacey Rankins 2025-01-08 13:53:51 0 9χλμ.
Information Services
Company Information Security
From cybersecurity solutions to risk management systems, these services are tailored to meet the...
από Michael Pokrovski 2024-03-13 22:07:40 0 27χλμ.
Телевидение
Телеканал Вкусное TV
Вкусное ТВ - тематический канал, ориентированный на тех, кто интересуется кулинарией и любит...
από Nikolai Pokryshkin 2022-11-02 18:40:40 0 29χλμ.
Social Issues
The Thin Blue Line (1988)
A film that successfully argued that a man was wrongly convicted for murder by a corrupt justice...
από Leonard Pokrovski 2023-07-24 19:35:46 0 28χλμ.

BigMoney.VIP Powered by Hosting Pokrov