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[8] [17] Their reduced size, functional connectivity, and activation contribute to the pathophysiology of ADHD, as well as imbalances in the noradrenergic and dopaminergic systems that mediate these brain regions. [8] [137] Genetic factors play an important role; ADHD has a heritability rate of 70-80%.
Risk factors for mental illness include psychological trauma, adverse childhood experiences, genetic predisposition, and personality traits. [7] [8] Correlations between mental disorders and substance use are also found to have a two way relationship, in that substance use can lead to the development of mental disorders and having mental disorders can lead to substance use/abuse.
ADHD was found more often in boys, at a rate of 2:1. [10] The most common form of ADHD was inattentive (2.95% of total population), followed by hyperactive/impulsive (2.77%), then combined (2.44%). [10] While differences in prevalence rate were found internationally, it is not clear whether this reflects true differences or changes in ...
A new study says that exhaust from gasoline containing lead may have contributed to ADHD, anxiety, and other mental health disorders in a large segment of the population
Certain genes influence the volume of key brain regions, which, in turn, could play a role in the development of Parkinson's disease and ADHD, a new study suggests. Parkinson’s, ADHD tied to ...
Large, high quality research has found small differences in the brain between ADHD and non-ADHD patients. [1] [15] Jonathan Leo and David Cohen, critics who reject the characterization of ADHD as a disorder, contended in 2003 and 2004 that the controls for stimulant medication usage were inadequate in some lobar volumetric studies, which makes it impossible to determine whether ADHD itself or ...
The precise genetic and environmental factors contributing to ADHD are relatively unknown, but endophenotypes offer a potential middle ground between genes and symptoms. [40] ADHD is commonly linked to "core" deficits involving " executive function ," " delay aversion ," or "activation/arousal" theories that attempt to explain ADHD through its ...
Sensory overload has been found to be associated with other disorders and conditions such as: Attention deficit hyperactivity disorder (ADHD) . People with ADHD display hypersensitivity to sensory stimuli from a young age; this hypersensitivity often persists into adulthood.
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