PSY 307 Lecture Notes - Lecture 9: Extraversion And Introversion, Phenotypic Trait, Neurology
Document Summary
Many levels of biological variables, beginning with genes, affect variation in personality, temperament, and character. Distance from gene to phenotypic trait is long, and there are many variables in between. Genetic variables tend to manifest directly at the biochemical level, affecting neurology and physiology. Effect of small differences in patterns of genes, maybe slight ripple effect on top traits, but larger effects on middle turtles. Related to variation in regulation of sensory input based on differences in arousability. It was found that introverts are able to be aroused more. The same level of stimulation leads to greater arousal ( sexual arousal) in introverts. Extraverts need greater stimulation to reach the same level of arousal. Extraverts more likely to become bored easily, feeling a situation does not stimulate them enough. Go seek a higher level of stimulation elsewhere. Amygdala: involved in appraising threat vs. reward in environment/situations/people (the emotional importance of them) Raising heart rate, blood pressure, cortisol, epinephrine levels, etc.
