In this context, both high and low values of signal transmission molecules (dopamine, serotonin, adrenaline/epinephrine, norepinephrine, acetylcholine, glutamate, gamma-aminobutyric acid/GABA) are negative. An ideal balance of signaling molecules is necessary. That is, for the balance of brain functions, the levels of signaling molecules that directly relate to brain functions, behaviors, and emotional states must also be balanced. Conversely, imbalances in the levels of signaling molecules lead to imbalances in the brain functions, behaviors, and emotional states they control (such as speech, learning, memory, cognitive skills, initiating and maintaining social interactions, attention and focus deficits, hyperactivity, psychotic behaviors/problem behaviors, behavioral disorders, harmful behaviors, mood disorders, irritability; quick temper, nervousness, anger control issues, anxiety disorders, anxiety, depression).

From this point, the following should be done:

1. The levels of signaling molecules should be measured.
2. High or low levels should be determined.
3. The values should be finely adjusted with meticulous medical interventions.
4. In other words, they should be brought to levels that need to be balanced through personalized medical interventions.
5. In the follow-up and improvement of autism (ASD), Attention Deficit Disorder (ADD), and Attention Deficit Hyperactivity Disorder (ADHD), a positive, precise medical approach focuses on the fine-tuning of signal transmission molecules (neurotransmitters).