What Are the Causes of ADHD?
The precise cause is unknown but the following factors are believed to contribute to the development of ADHD:
Heredity - ADHD tends to run in families. Children with attention deficit disorders normally have at least one close relative with the disorder, at least 1/3 of men with a history of ADHD bear children with this condition and some identical twins share the trait.
Glucose and Brain Chemicals - It has been shown that people with ADHD use less glucose (energy source) in the areas of the brain that control attention and inhibit impulses than those without the disorder. An imbalance of chemicals in the brain (neurotransmitters) may also be a contributing factor.
Pregnancy - Exposure to alcohol, tobacco and drugs, poor nutrition and infections during pregnancy may affect brain development in the fetus. Premature delivery and low birth weight may also be a cause of attention deficit disorders.
Toxins - Exposure to environmental toxins, like lead in early childhood may affect the development of the brain.
Head Injury - Head injuries, mostly those involving a concussion may be a factor.
Other - Nutrient deficiencies, food additives, food allergies, sucrose and ear infections/antibiotic use are also believed by some to be contributing factors.