hereditary factor
ADHD may be related to heredity, and the heritability is as high as 0.75-0.95438+0. Scientists have found that it is related to the polymorphism of dopamine receptor gene. In the future, it may be possible to reveal the answer through genetic testing.
Physiological structure
The abnormal rate of EEG in ADHD children is high, which is mainly manifested by the increase of slow wave activity. This may mean that their central nervous system maturation is delayed or their cerebral cortex is not awakened enough.
brain damage
Any slight brain injury during pregnancy, delivery and after may be the cause of ADHD in some children. But remember, not all children will be like this, and not all children with brain injury will get ADHD.
Neurotransmitter
ADHD may be related to the metabolic disorder of central neurotransmitters, for example, the functions of dopamine and adrenaline may be affected. This means that we may need to know more about the working mechanism of these "postmen".
neuroanatomy
Magnetic resonance imaging showed that the corpus callosum and caudate nucleus of ADHD children were smaller. This may reveal the other side of ADHD for us.