My friend and once and now occasional writing mentee jules-miz mindful occasionally writes about her PTSD-C and how when she learned about tanka poems from me she found that reading and especially writing the 5/7/5/7/7 syllable count poems works like EMDR for her. She wrote her best ever tanka series today. https://medium.com/mindful-expressions/reflections-in-the-window-425f9ecef525