Brain networks are groups of interconnected neurons that work together to perform specific functions. These networks help the brain process information, control movements, and regulate emotions. Different networks are activated depending on the task at hand, such as attention, memory, or language. Research has shown that brain networks can be categorized into two main types: task-positive networks, which are active during goal-directed activities, and default mode networks, which are active when the brain is at rest or engaged in self-referential thought. Understanding these networks is crucial for studying brain disorders and improving treatments.