Last year sarah stretched and ankle ligament beyond its limits while exercising. this caused an injury to her ankle. what is this kind of injury called?

“an abused child's thoughts occasionally drift to other, less anxiety-arousing topics; this anxiety reduction thus serves to strengthen 'other' thoughts, while weakening the thoughts about abuse.” a psychologist with which theoretical background would be most likely to offer this quotation as an explanation for the development of dissociative disorders?