Inspiration.

In my college philosophy class, when we were discussing the concept of identity, the guy told a story about a woman who'd had a small stroke. The effects overall weren't serious, but she found afterwards found that her tastes had changed - she no longer liked her favorite foods, and found herself eating things that had never appealed to her before. She no longer liked the colors she used to, her sleeping schedule changed, and persistent habits she'd had vanished.

His question was whether she was still the same person. My question is more practical - how do you get that without having a stroke? Will too many trans-Pacific flights do it? Too many kanji?

I say this because I'm wondering how I switched from being a person whose response to stress was to overeat, in high school and college, to being a person whose response to stress is to stop eating. I think I probably need to find the mechanism and switch it back, because I keep making myself sick without realizing it.