Dural tube is the membrane sleeve running from skull to sacrum that, in this model, links the two ends of the system.
In 📝Craniosacral Therapy a hold at the head is understood as related to a hold at the sacrum through that sleeve. The phrase is an experiential model, not a dissection the hands can prove, not settled physiology, and not a claim to treat the dura as a medical procedure. Nothing is pushed or adjusted.
Clients feel quiet at both ends, or one. Dizziness or neurological change is a stop and, if unexplained, a referral.