How Biology Shapes Personality — Summary of Chapter 8 from The Personality Puzzle
How Biology Shapes Personality — Summary of Chapter 8 from The Personality Puzzle Chapter 8 of The Personality Puzzle by David C. Funder examines the biological roots of personality—how the brain, neurotransmitters, and hormones shape our thoughts, emotions, and actions. This chapter integrates neuroscience with psychology to provide a deeper understanding of why we behave the way we do. Personality as a Biological Process Although personality appears stable, it is deeply intertwined with biological systems that are both adaptive and dynamic. Researchers use modern tools such as: Brain imaging (fMRI, PET scans) to study activity patterns linked to traits. Lesion studies (e.g., the case of Phineas Gage) to observe personality changes after brain damage. Neurochemical analysis to understand how neurotransmitters and hormones shape emotional and cognitive functioning. Key Brain Structures and Personality Amygdala: Regulates emotional responses, especially fe...