Causes of ADHD? What Does Science Say?

Attention Deficit Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder that begins in childhood but can continue into adulthood. The causes of ADHD, as well as its symptoms, have been a matter of curiosity in the scientific world for many years. Why does ADHD occur in some people? Genetic or environmental? What difference does it make in the brain?

Although it is difficult to give a clear answer to these questions, research shows that the combination of genetic predisposition, brain chemistry and environmental factors play a role in the emergence of ADHD. Let's take a closer look at the causes of ADHD.

Main Causes of ADHD

1. Genetic Factors: Is ADHD Inherited from the Family?
Scientists think that ADHD is a genetic disorder. So, what does this mean? If a family member (mother, father, or sibling) has ADHD, you are 2 to 8 times more likely to have ADHD yourself.
In studies conducted on twins, if one of the identical twins has ADHD, the probability of having it in the other is around 70-80%. This suggests that genetics plays an important role. However, there is no single gene that causes ADHD. Instead, the combination of multiple genes related to attention and impulse control increases the risk of ADHD.
Research on genes specifically related to dopamine and serotonin shows that these neurotransmitters (brain chemicals) may be linked to ADHD symptoms.
But there is one point that should not be forgotten: Genetic predisposition does not mean that ADHD will definitely develop. Environmental factors can also affect the process.

2. Brain Structure and Chemistry: How Does the ADHD Brain Work Differently?
ADHD is not just a behavioral condition, but is also associated with structural and functional differences in certain regions of the brain. Brain imaging studies show changes in individuals with ADHD, especially in the following regions:

• • Prefrontal cortex: Manages attention, planning and self-control. It has been observed that the activity of this region is lower in individuals with ADHD.
  • Basal ganglia: Related to movement and impulse control. Individuals with ADHD may have problems regulating the signals here.
  • Limbic system: Related to emotional regulation and motivation. Sudden mood swings are more common in people with ADHD.

These differences in the brain are also linked to the imbalance of neurotransmitters. In particular, chemicals such as dopamine and norepinephrine play a key role in ADHD. Dopamine is involved in motivation, feelings of reward and learning processes. It has been observed that dopamine levels are lower in individuals with ADHD.

Therefore, medications used to treat ADHD generally work to increase dopamine and norepinephrine levels.

3. Environmental Factors: Does ADHD Occur Later?

Even if you have a genetic predisposition, some environmental factors can increase the risk of developing ADHD. In particular, research shows that the following conditions may be associated with ADHD:

Factors exposed during pregnancy:

• • Mother's smoking, alcohol or drug use during pregnancy,
  • Malnutrition or high stress,
  • Heavy metal (such as lead) exposure.

Factors that may be effective during infancy and childhood:

• • Premature birth or low birth weight,
  • Serious infections that may affect brain development,
  • Frequent head injuries in childhood.

Nutrition and lifestyle:
Although ADHD has not been proven to be directly linked to diet, it is thought that some foods may affect symptoms. In particular, processed foods, additives, excessive sugar consumption and omega-3 deficiency can aggravate ADHD symptoms.

Some studies show that a diet high in omega-3 fatty acids and protein can improve attention.

Technology and screen time:
It is thought that exposure to excessive screen time in childhood may affect the brain's attention span. However, screen use does not cause ADHD; It may only worsen symptoms.

4. ADHD and the Modern World: Is It Really More Common?

There has been a huge increase in ADHD diagnoses in recent years. So, does this mean that ADHD is actually becoming more common, or has awareness just increased?

According to scientists, ADHD has been around for many years. However, nowadays:

• • Attention deficit is noticed more quickly in schools and workplaces,
  • Thanks to advances in psychology and neuroscience, better diagnosis is made,
  • Technology and fast-paced lifestyles create more challenges for individuals with ADHD.

Additionally, new generation attention measurement techniques such as EEG allow objective measurement of ADHD. While in the past diagnosis was made based only on observations, now more precise data can be obtained by analyzing brain waves.

In conclusion: There is no single cause of ADHD!

ADHD is a condition that occurs with a combination of genetics, brain structure and environmental factors. So, it would not be right to attribute it to a single reason. However, understanding how our brain works is a huge advantage for managing ADHD symptoms.

Today, many scientific methods are used to better understand ADHD and develop correct strategies. Better understanding our own brain and attention is one of the most powerful tools for managing symptoms.

So, have you ever wondered how your attention really works?