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While the exact mechanisms behind these effects are still under discussion, scientists studying psychoneuroimmunology have found many ways that the mind can influence the body.

Engel said he was told the sleep study he was wanted for was being conducted by the Norman Cousins Center for Psychoneuroimmunology at UCLA, which he’s never had any dealings with.

Lyte’s own interest in the question dates back to his time as a postdoctoral fellow at the University of Pittsburgh in 1985, when he found himself immersed in an emerging field with an unwieldy name: psychoneuroimmunology, or PNI, for short.

Entire fields like psychoneuroimmunology and psychoendocrinology have emerged to investigate the relationship between psychological and physiological processes.

But his latest findings have caused Cole — now a professor at the Cousins Center for Psychoneuroimmunology at the University of California, Los Angeles — to wonder whether the exhilaration and sense of purpose that he felt during that period might have done more than help him to find homes for unloved pieces of art.