Brain chemistry refers to the complex interactions of chemicals in the brain that influence mood, behavior, and cognitive functions. These chemicals, known as neurotransmitters, include serotonin, dopamine, and norepinephrine. They help transmit signals between nerve cells, playing a crucial role in regulating emotions, motivation, and overall mental health. The balance of these neurotransmitters is essential for proper brain function. For instance, low levels of serotonin are often linked to depression, while dopamine is associated with pleasure and reward. Understanding brain chemistry can help in developing treatments for various mental health conditions, such as anxiety and schizophrenia.