The document provides an overview of the basic structures and functions of the human brain. It discusses that humans are born with around 150-200 billion neurons, though around 100 billion remain after pruning. The brain has huge plasticity due to billions of glial cells and the ability to form connections between neurons. It then outlines the main structures of the cortex which are involved in functions like judgment, creativity, sensory processing, language, vision, and emotion. The prefrontal cortex, amygdala, and hippocampus are also introduced in relation to emotion, fear memory, and long term memory. Current research is examining links between brain pathways and learning patterns but no definitive brain scan profiles have been established for diagnoses.