Hey alophysio,
Thanks for the post.
The thing that baffels me is what am I feeling.... The CSF flow is so gentle that it can't be measured unless you puncture the dura.
So here is my thought. What if (in the legs especially) you are getting a rythm from the diaphragm and/or intercostals. The force they generate CAN be felt through fascia and muscle.
Another question is "can we feel the rythm in animals?" Where is the rythm coming from in an animal on all fours? Is it different and why?
Adamo