Which of the following is NOT a component of joint fixation?

• A. Interarticular block
• B. Periarticular fibrosis and adhesions
• C. Muscle hypertrophy
• D. Joint instability

Answer: (C)

Muscle hypertrophy is not a component of joint fixation. Joint fixation typically refers to the restriction of normal movement in a joint, often due to factors like interarticular block, which involves mechanical obstructions within the joint space, and periarticular fibrosis and adhesions, which are soft tissue changes that can limit mobility around the joint. Joint instability, while it might relate to how a joint functions, does not contribute to the fixed or restricted state associated with joint fixation.

In contrast, muscle hypertrophy refers to the increase in muscle mass and size as a result of strength training or other forms of resistance exercise. While it may have implications for overall joint function and stability, it does not contribute to the fixation of the joint itself. Understanding these distinctions can help in recognizing the various effects and conditions related to joint movement and stability in chiropractic care.