Lecture 5 Flashcards
Eysenck and Gray on personality
a single brain strucutre makes the personality
Zuckerman and Cloninger on personality
neurotransmitter system makes the personality
Eysenck on extraversion in the brain
determined by activation in neocortex = arousal
Ascending Reticular Activating System (brain stem)
alerts brain
need for stimulation
Eysenck
introverts are more easily aroused than extraverts
Dodson Law
cognitive performance and emotional well-being have an optimal arousal point
Geen study
extraverts perfored worse at lower arousal level
vice versa for introverts
voxel
one cubical milimeter of the brain
Eysenck on neuroticism
more limbic system arousal
BAS
behavioral activation system
positive emotion and reward seeking
septic area in lymbic system
BIS
behavioral inhibition system
supression of behavior
negative emotions
anxiety
linked to BIS
impulsivity
linked to BAS
frontal asymetry
more right frontal cortex activity when negative things happen
BAS and frontal asymetry
higher BAS = higher frontal asymetry
extraversion and high neuroticism
impulsivity disorders
addiction
antisocial behavior
Zuckermans’s sensation-seeking scale
thrill and adventrure seeking scale
experience seekin
boredom susceptability
disinhibition
low MAO
higher baseline dopamine
- > you need a lot of dopamine to feel reward
- > more sensation seeking
7R
variant of DRD4 gene
less dopamine signalling
higher sensation seeking
where do mutations occurs?
almost always in sperm cell
directional selection
unfavourable genetic variation disappears
encephalization coefficient
relation between brain and body size
heterozygotic advantage
optimal is a combination of two extremes
-> both alleles remain in population
intersexual selection
traits that attract mates
may have disadvantages for survivial
intrasexual competition
flaunting assets of own sex to increase reproduction
