The injury, inflicted accidentally by her father, caused the parents to dote upon her to the dissatisfaction of her 4 older sisters. She had her thyroid removed after marriage and a child. Evidently her behaviour suggested a thyroid problem. However, it would seem to be proven that the thyroid was not the only problem as her erratic behaviour continued. She would lose her temper easily. Rant and rave. So the injury may have only been the root of the problem, the family social problems simply aggravated the problems caused by the traumatic injury.