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The biology of potential illness arises early in life. The brain’s stress-response mechanisms are programmed by experiences beginning in infancy, and so are the implicit, unconscious memories that govern our attitudes and behaviours toward ourselves, others and the world. Cancer, multiple sclerosis, rheumatoid arthritis and the other conditions we examined are not abrupt new developments in adult life, but culminations of lifelong processes. The human interactions and biological imprinting that shaped these processes took place in periods of our life for which we may have no conscious recall.
Emotionally unsatisfying child-parent interaction is a theme running through the one hundred or so detailed interviews I conducted for this book. These patients suffer from a broadly disparate range of illnesses, but the common threads in their stories are early loss or early relationships that were profoundly unfulfilling emotionally. Early childhood emotional deprivation in the histories of adults with serious illness is also verified by an impressive number of investigations reported in the medical and psychological literature. In an Italian study, women with genital cancers were reported to have felt less close to their parents than healthy controls. They were also less demonstrative emotionally. A large European study compared 357 cancer patients with 330 controls. The women with cancer were much less likely than controls to recall their childhood homes with positive feelings. As many as 40 per cent of cancer patients had suffered the death of a parent before the age of seventeen—a ratio of parental loss two and a half times as great as had been suffered by the controls.
The thirty-year follow-up of Johns Hopkins medical students was previously quoted. Those graduates whose initial interviews in medical school had revealed lower than normal childhood closeness with their parents were particularly at risk. By midlife they were more likely to commit suicide or develop mental illness, or to suffer from high blood pressure, coronary heart disease or cancer. In a similar study, Harvard undergraduates were interviewed about their perception of parental caring. Thirty-five years later these subjects’ health status was reviewed. By midlife only a quarter of the students who had reported highly positive perceptions of parental caring were sick. By comparison, almost 90 per cent of those who regarded their parental emotional nurturing negatively were ill. “Simple and straightforward ratings of feelings of being loved are significantly related to health status,” the researchers concluded.
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