Cranial Motion that Results in a “Sidebending Rotation” Somatic Dysfunction, with Axes.

Purpose: Illustrate the complex motions of the occiput and sphenoid that result in a “sidebending rotation” somatic dysfunction. Both vertical and anterior-posterior axes of each bone are illustrated, light green for the sphenoid and purple for the occiput.  The motion of the sphenoid is rotation to the left while sidebending to the right. The corresponding motions of the occiput are rotation to the right while sidebending to the right.