The 33 access points are located mostly on the sacrum and cranium, where the dura mater is close to the skin. Making contact with these access points sends a message to the brain to release spinal blockages. Think of it in the same way as the Dr would tap under your knee and your knee jerks. The signal is sent up the nervous system to the brain and back down to the knee in microseconds from when the hammer is tapped on your knee.