The head

The skull consists of 22 cranial and facial bones, it encases and protects the brain, muscles, blood vessels, nerves, glands, nose, mouth, teeth, tongue, and throat ...(anatomy of the head)
What Is Cranial Osteopathy?

Cranial sacral therapy is manual manipulation of the cranial bones and membranes to allow the cerebral spinal fluid to flow properly. It addresses areas of restricted movement that compromise function to re-establish normal movement, subsequently reducing pain and improving daily functioning.
Because the craniosacral system encompasses the brain and spinal cord, it influences the entire nervous system, affecting many body functions. Patients often report a sense of deep relaxation during and after the cranial treatment session.