When we look at cranial bone axis of rotation, it is important to understand the shape the brain makes in its fluctuation of flexion and extension as moved by primary respiration, the way the dura accommodates this change of shape, and the way the infoldings of the dura, the falx and tentorium then move, and because of their endosteal attachment to bone, we can understand cranial bone motion rather than having to memorize. The second video unfortuantely does not show correct osteopathic motion, but does give us a sense of how falx affects frontal and parietal bone, and we'll discuss it in the classroom space this coming MONDAY (because I'm teaching wednesday) in our WEBINAR on the frontal and parietal bones.