Tendonosis is described as what movement pattern?

Tendonosis is described as what movement pattern?

• A. Active finger extension created by passive wrist flexion
• B. Active finger flexion created by active wrist extension
• C. Passive finger extension created by active wrist extension
• D. Passive finger flexion created by active wrist extension

Answer: (D)

The concept at play is the tenodesis effect: the tendons that bend the fingers run across the wrist, so changing the wrist position automatically changes finger position. When you actively extend the wrist, those flexor tendons become taut and pull the fingers into flexion passively—there’s no need for active finger flexor contraction. That’s why the pattern is passive finger flexion produced by active wrist extension. Conversely, wrist flexion would slacken the tendons and allow passive finger extension.

The concept at play is the tenodesis effect: the tendons that bend the fingers run across the wrist, so changing the wrist position automatically changes finger position. When you actively extend the wrist, those flexor tendons become taut and pull the fingers into flexion passively—there’s no need for active finger flexor contraction. That’s why the pattern is passive finger flexion produced by active wrist extension. Conversely, wrist flexion would slacken the tendons and allow passive finger extension.