CBP Spinal Physics and Mechanics Flashcards

In CBP, which spinal region is considered to have the greatest influence on global sagittal balance?

Answer: Sacral base angle

The sacral base angle is foundational in CBP sagittal balance assessment because it sets the foundation for lumbar lordosis and cascades to affect all superior spinal curves.

What is the CBP-defined normal lumbar lordosis Cobb angle (L1–L5)?

Answer: 40–60 degrees

CBP identifies the normal lumbar lordosis (L1–L5 Cobb) as approximately 40–60 degrees, aligned with the ideal load-bearing geometry of the lumbar spine.

Which type of stress is most elevated in intervertebral discs when axial rotation and flexion are combined?

Answer: Tensile stress on the annular fibers

Combined axial rotation with flexion places the highest tensile stress on the posterior-lateral annular fibers, a mechanism associated with disc herniation.

In CBP biomechanics, what is the functional significance of the thoracic kyphosis angle?

Answer: It must be balanced with lumbar lordosis and cervical lordosis to maintain global sagittal alignment

Thoracic kyphosis angle is integral to global sagittal balance; changes in thoracic kyphosis directly compensate for or worsen cervical and lumbar curve deviations.

Which force vector is the primary focus when CBP clinicians design a spinal traction setup?

Answer: The vector that opposes the measured postural displacement (mirror image vector)

CBP traction setups are engineered to apply the mirror image corrective force vector—directly opposing the specific displacement quantified on the patient's radiograph.

What does 'global translatory position' refer to in CBP postural analysis?

Answer: The horizontal displacement of the head or trunk relative to the pelvis in the sagittal or frontal plane

Global translatory position measures how far a spinal region (or the head) has shifted horizontally from its ideal alignment position over the pelvis.