Inferior Medial Longitudinal Arch technique, what is the CP?

• A. Outside thumb w/ reinforced pisi
• B. Thumb w/ reinforced pisi
• C. Chiro/chiro
• D. Knife Edge

Answer: (A)

The contact point used for this maneuver should give a broad, stable surface that can transmit controlled, precise pressure along the arch without collapsing or slipping. The outside edge of the thumb with reinforcement from the pisiform provides exactly that: a wide, stable contact on the plantar aspect that follows the arch, while the reinforced pisiform distributes load and protects soft tissues. This combination allows you to apply the correct direction and amount of force to influence the inferior medial longitudinal arch safely and effectively. A plain thumb lacks the same surface area and stability, a knife edge is too sharp and risks tissue injury, and a term like chiro/chiro doesn’t specify a usable contact point for this technique.