What is the contact point (CP) for lumbar extension?

What is the contact point (CP) for lumbar extension?

• A. Pad of 1st digit (#4)
• B. Pad of 2nd digit (#6)
• C. Pad of 4th digit (#7)
• D. Pad of 3rd digit (#5)

Answer: (B)

The contact point for lumbar extension is chosen for how it feels and holds up during movement. You want a surface that can sense small, posterior shifts of the lumbar vertebrae as the patient extends, without sliding or distorting the tissue. The pad of the index finger provides a stable, broad, sensitive surface that can nestle over the paraspinal region and the spinous processes. It allows you to apply gentle, controlled pressure and maintain contact through the entire extension, so you can notice the subtle vertebral or segmental movements as they occur. Using this pad gives a reliable, repeatable feel across levels, which is essential for accurately tracking lumbar extension. Other contact surfaces tend to have too little area or pressure control, making it harder to detect the precise movement you’re assessing.

The contact point for lumbar extension is chosen for how it feels and holds up during movement. You want a surface that can sense small, posterior shifts of the lumbar vertebrae as the patient extends, without sliding or distorting the tissue. The pad of the index finger provides a stable, broad, sensitive surface that can nestle over the paraspinal region and the spinous processes. It allows you to apply gentle, controlled pressure and maintain contact through the entire extension, so you can notice the subtle vertebral or segmental movements as they occur. Using this pad gives a reliable, repeatable feel across levels, which is essential for accurately tracking lumbar extension. Other contact surfaces tend to have too little area or pressure control, making it harder to detect the precise movement you’re assessing.