What can be said of the main motion of the upper and lower cervical complexes?
Answer: They are always the same- ie. if Lower Cervical is rotating to the left, the upper cervical will rotate to the left.
What can be said of the main motion of the upper and lower cervical complexes?
Answer: They are always the same- ie. if Lower Cervical is rotating to the left, the upper cervical will rotate to the left.