Physiologically, there seems Meridian Health Protocol Review to be less dopamine and nor-epinephrine within the brains of those with ADHD and four genes that regulate dopamine have been identified as ADHD causal agents; however a definite causal agent has not been confirmed (Barkley, 2005). Brain activity is considerably lower in the pre-frontal lobe regions in those with ADHD and there is also decrease in blood flow (Hans, Henricksen & Bruhn, 1984), (Barkley, 2005). According to Barkley (2005), psychological characteristics of ADHD are that it is about the "behavioral inhibition."
These children do not benefit from what may happen later based upon what they do now; which can be compared to a "time near sightedness", (Barkley, 2005). They have difficulty identifying their past, preparing for the future, organizing, scheduling, and working independently, with social and occupational issues (Barkley, 2005). It is these difficulties when intermingled with the development of the individual that could clearly cause great difficulties especially when enrolled in formalized schooling and onward into the demands of school and adulthood.
The prevalence rates regarding the diagnosis of ADHD has been from ranges of 4 % to 18 % depending upon the community, types of populations, and areas of analysis (Visser & Lesesne, 2005). ADHD is one of the most common childhood disorders with 2.5 million children with this disorder (Barkley, 2005). Estimates show (Biederman, 1996), that nearly 6 % of boys and 1.5 % of girls have ADHD (Singh, 2002). It cost nearly 3.3 billion dollars to medically treat ADHD every year in the United States (Visser & Lesesne, 2005).