CAMRT Radiography Practice Exam

Which of the following is NOT a structural joint type?

1. Fibrous

2. Cartilaginous

3. Elastic

4. Syndesmosis

The correct answer is: Elastic

The correct answer highlights that elastic is not classified as a structural joint type. Structural joint types are defined by the material that binds the bones together and are classified primarily into fibrous, cartilaginous, and synovial joints. Fibrous joints are made up of dense connective tissue, with little or no movement allowed. Examples include sutures in the skull. Cartilaginous joints involve cartilage and allow for more flexibility than fibrous joints but still offer limited movement, such as the joints between the vertebrae. Syndesmosis, a specific type of fibrous joint, is characterized by bones connected by a ligament or interosseous membrane, allowing for slight movement. In contrast, "elastic" does not refer to a recognized category of structural joints. While elastic fibers may be found in various tissues throughout the body, they are not a type of joint structure as recognized in classical joint classification. This reinforces the idea that the primary classifications of joints center around the nature of the connective tissue that holds the bones together rather than other types of fibers or tissues.