... linked. Some studies show that smoking, drinking alcohol, and using drugs during pregnancy, influenced a small percentage of ADD cases. Exposure to toxins, such as lead, may also alter the brain chemistry and function. Both of these issues are cause for concern for the at-risk population. Moreover, ADD generally affects males more often than females, in a 3:1 ratio. Because this disorder effects ... linked. Some studies show that smoking, drinking alcohol, and using drugs during pregnancy, influenced a small percentage of ADD cases. Exposure to toxins, such as lead, may also alter the b...

• Word Count: 12292
• Approx Pages: 49
• Has Bibliography

... 2). This is currently how it exists today, with the addition of a new category Attention Deficit Hyperactivity Disorder and there sub types. Most scientists now believe that an abnormality in brain chemistry could be to blame for the symptoms of Attention Deficit Disorder. The frontal lobes of the brain are believed to be responsible for the regulation of behavior and attention. They ... linked. Some studies show that smoking, drinking alcohol, and using drugs during pregnancy, influenced a small percentage of ADD cases. Exposure to toxins, such as lead, may also alter the brain chemist...

• Word Count: 2502
• Approx Pages: 10
• Has Bibliography
• Grade Level: Undergraduate