What is the maximum degree of flexion possible at the elbow?

The maximum degree of flexion at the elbow is typically in the range of 140 to 150 degrees. This range is based on anatomical studies of the elbow joint, which is primarily a hinge joint allowing movement in one primary plane. The structure of the elbow, including the interaction between the humerus and the bones of the forearm (the radius and ulna), facilitates this degree of flexion when the arm is bent.

Flexion occurs when the angle between the forearm and the upper arm decreases. The elbow's ligaments, particularly the collateral ligaments, provide stability while allowing a significant range of motion during flexion. The presence of soft tissue structures, including muscles and tendons around the elbow, also contribute to this flexible range.

The other options refer to much lesser degrees of range, which do not accurately represent the functional capacity of the elbow joint. Options indicating significantly lower degrees of flexion do not align with either anatomical function or clinical observations of joint movement. Thus, the correct understanding of elbow flexion capacity is well established at 140 to 150 degrees.