What term describes the bending motion of an articulation, decreasing the angle between associated bones?

• A. Extension
• B. Adduction
• C. Flexion
• D. Rotation

Answer: (C)

Flexion refers to the bending motion of a joint, resulting in a decrease in the angle between two bones. Common examples of flexion include bending the elbow or knee, where the two individual bones that make up the joint come closer together as the angle decreases. This movement is fundamental in many daily activities and exercises, and it plays a critical role in biomechanics within various fields such as physical therapy, sports science, and anatomy.

In contrast, other terms like extension refer to the action of straightening the joint and increasing the angle between bones, adduction involves movement toward the midline of the body, and rotation denotes the turning of a body part around its axis. Understanding the definition of flexion helps in grasping how joints function in the body and the movements they facilitate.