Thanks Shanti for your answer. I already recommended my correspondent lessons 69 and 83. I read carefully the topics you suggest but I don’t find any answer to my question. My guess is that head stand has no noticeable effect on kundalini, perhaps it can even made things worse. I agree with warnings Yogani gives about head stand. When I was younger I practiced head stand and I needed many sessions with my osteopath to correct my cervical vertebrae. Now, I practice shoulder stand and never more head stand.