Wound, Ostomy and Continence Nurses Society (WOCN) Practice Exam

Which joint is affected by the proximal interphalangeal joints (PIP joints)?

1. Joints at the base of the foot

2. Joints between the first and second toes

3. Joints between the two most proximal toe bones

4. Joints in the ankle

The correct answer is: Joints between the two most proximal toe bones

The proximal interphalangeal joints (PIP joints) specifically refer to the joints located between the first and second phalanges of the fingers and toes. In the context of the choices provided, the correct option identifies the joints that are in the same line of anatomical classification as the PIP joints. The choice that accurately denotes the articulation in question is associated with the two most proximal toe bones. This is essential because the PIP joints are found in both the hands and feet, involving the movement and flexibility between these specific phalanges. Understanding the anatomy of the foot, this relationship helps clarify how the PIP joints operate, primarily influencing the second through fifth toes in the same way they function in the fingers. The other options refer to various parts of the body that do not have the same anatomical relationship. The joints at the base of the foot are typically referring to the tarsal joints or metatarsophalangeal joints, and the ankle joints involve a different set of bones altogether, including the tibia and fibula. Therefore, recognizing the PIP joints' precise function and location is key to grasping this material fully.