psychological illnessgenetics: genes you receive from your mom and dad may make you more vulnerable to developing borderline personality disorder, given sure environmental variables (see below). 2. neurotransmitters: these are "messenger compounds" used by your brain to transmit signals between brain cells; convinced neurotransmitters can have a notable effect on emotional state and conduct. 3. neurobiology: this term describes the structure and function of your brain and nervous system; it appears that some people with borderline personality disorder have several regions in the brain with unnatural structure and function. 4.
Handy Online Medical Dictionary