Which of the following is a condylar joint?

• A. elbow joint
• B. shoulder joint
• C. knuckle joint, where the phalanges attach to the metacarpals
• D. hip joint

Answer: (C)

Verified step by step guidance

1. Understand the types of synovial joints: Synovial joints are classified into several types based on their shapes and the movements they allow. These include hinge, pivot, ball-and-socket, saddle, plane, and condylar joints.
2. Identify the characteristics of a condylar joint: A condylar joint, also known as an ellipsoidal joint, allows movement in two planes, permitting flexion, extension, abduction, adduction, and circumduction. It is characterized by an oval articular surface that fits into a complementary depression.
3. Examine the given options: Consider the anatomical structure and movement capabilities of each joint mentioned: elbow joint, shoulder joint, knuckle joint, and hip joint.
4. Analyze the knuckle joint: The knuckle joint, where the phalanges attach to the metacarpals, is a classic example of a condylar joint. It allows for the movements typical of condylar joints, such as flexion and extension, as well as some degree of lateral movement.
5. Conclude with the correct identification: Based on the characteristics and movement capabilities, the knuckle joint is the correct example of a condylar joint among the options provided.