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Etiology
Biological
~ Genetics
- Genes inherited from ones parents might make you more vulnerable to developing borderline personality disorder
- Norwegian study of identical twins = Heritability of 42 percent
- Chromosome 9 highest linkage rate
~ Neurotransmitters or "messenger chemicals" responsible for reg. of sleep, learning, and mood may be at lower levels
~ Brain/Prefrontal cortex
- Prefrontal cortex may be smaller or less developed than most (regs. emotions, self control, and behavior)
Environmental
~ Childhood events & Social/cultural surroundings play great role in personality development
- Unstable family relationships
- Childhood neglect/abandonment
- Chronic intense stress & fear
~ Childhood trauma
- Sexual/Emotional/Physical Abuse
& - Brain formation also shaped by environment
Risk Factors
- Childhood abuse
- Brain abnormalities
- Direct relative with mental health disorder
- Hereditary predisposition