When I lived in Japan, they only cut hair dry. Then washed it. Then blow dried it. Can you find a Japanese hairdresser?
That is interesting about neural development. My daughter has a white streak in her hair. The hair dresser once asked if she had had an injury as it indicates that those hair sacs have died. I wonder if that was pre birth cause she never had a head injury? But then I have had 5 pretty full on concussions (fell of a wall, fell of a roof, got hit over the head with a bag of cans, fell of a horse, had the biggest boy in class fall into me into a metal locker) and my hair is super uneventful!
Anyway, I digress.... best of luck finding a hairdresser.
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"I will file you under "L" for people I love most. "