College of Massage Therapists of British Columbia (CMTBC) Practice Exam

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What role does the volar plate play in Swan Neck Deformity?

It reduces pain in the fingers
It stabilizes the PIP joint
It assists finger flexion
It is torn in this deformity

The correct answer is: It is torn in this deformity

In Swan Neck Deformity, the volar plate plays a critical role as it is often associated with injury or dysfunction. The volar plate is a fibrous structure located on the palmar (volar) side of the proximal interphalangeal (PIP) joint, providing stability and preventing hyperextension. In cases of Swan Neck Deformity, the volar plate can become damaged or torn, which contributes to the characteristic hyperextension of the PIP joint and flexion of the distal interphalangeal (DIP) joint. Understanding this mechanism is essential for grasping how the deformity develops and the implications it has for joint function and rehabilitation. The other functions considered, such as reducing pain, stabilizing the PIP joint, or assisting finger flexion, are not the primary roles of the volar plate in the context of Swan Neck Deformity. The primary focus is indeed on the tear or dysfunction of the volar plate, leading to the altered positioning of the fingers.