The human brain operates through electrical signals, categorized into different frequency bands that correspond to various cognitive and physiological states. Among these, delta (0.5–4 Hz) and theta (4–8 Hz) waves play critical roles in brain function, particularly in the frontal lobes, which are responsible for executive functions, decision-making, and emotional regulation. Abnormal activity in these frequencies is linked to various neurological and psychiatric conditions, including schizophrenia, depression, traumatic brain injury (TBI), ADHD, and neurodegenerative diseases. Electroencephalography (EEG) is a key diagnostic tool in assessing delta and theta activity, providing valuable insights into brain function and potential disorders. The Discovery of...