Certified Hand Therapist (CHT) Practice Exam

What is the role of the transverse retinacular ligament?

1. Stabilizes the metacarpophalangeal joint

2. Facilitates DIP joint extension

3. Aids in flexor tendon glide

4. Limits excessive dorsal movement of lateral bands

The correct answer is: Limits excessive dorsal movement of lateral bands

The correct answer highlights the role of the transverse retinacular ligament in stabilizing the structure of the finger, specifically by limiting excessive dorsal movement of the lateral bands. The transverse retinacular ligament is situated at the level of the distal interphalangeal joint and plays a crucial role in ensuring the functional alignment and movement of the extensor tendon systems. By providing this stability, it prevents the lateral bands from migrating too far dorsally during finger extension, which is essential for maintaining the proper mechanics of the finger. This function is particularly important in promoting effective joint motion and preventing joint deformities or extension lag, which could occur if the lateral bands were allowed to move excessively. Such stability directly contributes to the overall efficiency of finger extension, enabling both dexterity and strength in hand movements. Other choices do not accurately reflect the specific role of the transverse retinacular ligament, illustrating other aspects of finger function or joint stabilization that do not pertain specifically to its primary responsibilities.