I'm sure there's other info needed to diagnosis this problem but here's what I know. The two bony processes of the #1 cervical vertebre that are normally supposed to be below the foramen magnum have slipped up into the magnum of my friends neck. As a result he has constant neck stiffness, lack of mobility, and numbness/some pain to his arm(s). I suggested that he may want to seek a DO's recommendation who uses OMM and see what they say. Anyone know whether this problem can be treated with OMM?