Early parental loss and incest are commonly associated with borderline. Neurological physical examinations are abnormal. Sound interpretation is impaired. Memory and vision are impaired. Glandular function may be abnormal.
Sleep is abnormal.
The response to some medications is bizarre. When injected intravenously, the medication procaine normally causes drowsiness, but a borderline will feel the 'dysphoria' described in the first paragraph. Borderlines likely have abnormalities with the neurotransmitter 'serotonin' - an incredibly important brain chemical. Serotonin problems can cause anxiety, depression, mood disorders, improper pain perception, aggressiveness, alcoholism, eating disorders and impulsivity. Excess serotonin can depress behavior.