DNA Nervous System TestThe nervous system helps send messages between the brain and body, allowing us to react to the world around us. Neurotransmitters are tiny chemical messengers that carry these signals between nerve cells. Some neurotransmitters speed things up (excitatory), while others slow things down (inhibitory). For us to stay calm, focused, and healthy, these two types need to stay in balance. This test looks at gene varients that affect important brain