Certified Electronic Health Records Specialist (CEHRS) Practice Exam

What type of joint allows for the greatest movement?

1. Synarthroses

2. Amphiarthroses

3. Diarthroses

4. Cartilaginous joints

The correct answer is: Diarthroses

The type of joint that allows for the greatest range of movement is diarthroses. Diarthroses are classified as synovial joints, which are characterized by a joint cavity filled with synovial fluid, allowing for significant mobility. This classification includes joints such as the knee, elbow, and shoulder, which can perform a variety of movements including flexion, extension, rotation, and gliding. In contrast, synarthroses are joints that allow for little to no movement, typically found in areas like the skull where stability is essential. Amphiarthroses allow for slight movement but are not nearly as mobile as diarthrodial joints. Cartilaginous joints also tend to allow limited movement, as they are connected entirely by cartilage, which provides stability but restricts motion compared to synovial joints. Thus, among the types listed, diarthroses are uniquely designed to facilitate the greatest movement, making them essential in the body for high mobility locations.