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Attention deficit hyperactivity disorder (ADHD) [1] is a neurodevelopmental disorder characterized by executive dysfunction occasioning symptoms of inattention, hyperactivity, impulsivity and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and developmentally-inappropriate.
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 ...
ADHD has a prevalence rate of around 5-12% in children residing in Spain. The rate for adults in Spain is an estimated 0.5-5%. The reason for this low estimated prevalence rate of ADHD in adults could be due to underreported numbers within the older age range. [28] Rates in Spain are estimated at 6.8% among people under 18. [29]
One in four U.S. adults suspects they may have ADHD and drugs are a first line of treatment for this condition. But what does research say about their impact on the brain and quality of life?
ADHD also has high rates of comorbidity with these disorders in adulthood, further leading clinicians to pursue evaluation for these disorders over ADHD. [10] Furthermore, the stigma surrounding ADHD causes many adults to forego seeking treatment altogether. [13] Another barrier to diagnosis is faced by highly intelligent or high-functioning ...
Subsequent research established that it can be comorbid with ADHD—and present in individuals without ADHD as well. Therefore, and due to many other lines of evidence, there is a scientific consensus that the condition is a distinct syndrome.
The hypothesis notes that humans spent most of their evolutionary history in hunter-gatherer societies, and it argues that ADHD represents a lack of adaptation to farming societies. Hartmann first developed the idea as a mental model after his own son was diagnosed with ADHD, stating, "It's not hard science, and was never intended to be." [1]
PMDD can cause a range of mental, physical and behavioral symptoms. According to the DSM-5 , the Diagnostic and Statistical Manual of Mental Disorders, PMDD symptoms include: Mood-related symptoms
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