What is the normal capsular pattern for the humeroulnar joint?

• A. No true capsular pattern; equal limitation of pronation and supination
• B. Flexion > extension (+/-4:1)
• C. External rotation > abduction > internal rotation
• D. Flexion = extension

Answer: (B)

The main idea is how a joint’s capsule shapes the pattern of motion loss. For the humeroulnar (elbow) joint, a capsular pattern means the elbow loses more range in flexion than in extension. In practice this is described as flexion being limited to a greater degree than extension, often cited with a ratio around 4:1. This reflects how the elbow’s capsule and ligaments constrain bending more than straightening.

Other options point to different joints or noncapsular restrictions. The shoulder’s pattern is external rotation > abduction > internal rotation, not about the elbow. Equal loss of pronation and supination describes forearm joints rather than the elbow in isolation. Flexion = extension would suggest no capsular pattern, which isn’t characteristic of the elbow.