In which position does Type II mechanics primarily occur?

Type II mechanics primarily occur in flexion or extension. This is rooted in the principles of spinal biomechanics defined by Korr and Fryette's laws. In Type II mechanics, the motion of one vertebra is coupled with the motion of the adjacent vertebrae, specifically where side bending and rotation occur in the same direction. This coupling typically manifests when the spine is not in a neutral position, which is characteristic of flexion and extension states.

In these positions, the freedom of movement allows for the dynamic nature of the vertebrae to exhibit rotational and lateral bending movements more prominently. This differentiates Type II mechanics from Type I mechanics, which occur primarily in a neutral position and involve side bending and rotation in opposite directions. Understanding this concept is crucial for osteopathic practice as it relates to diagnosing and treating somatic dysfunctions linked to spinal mechanics.