The Range of Motion as Well as the Direction of Motion

Multiple Choice

The range of motion as well as the direction of motion for the various regions of the spine differs. For example the lumbar spine is capable of flexion and extension but little rotationalmovement. While the thoracic spine rotates with little flexion or extension. This is due tovariation in________.

A) the composition of the intervertebral disks
B) the orientation of the superior and inferior articular facets
C) the thickness of the intervertebral disc
D) the arrangement of muscular attachment to the spinous processes