What is the normal capsular pattern for the radiocarpal joint?

• A. Flexion > extension
• B. Extension > flexion
• C. Flexion = Extension
• D. Flexion and extension are not related

Answer: (C)

The main concept is how a joint’s capsule governs movement when a capsular pattern is present. For the radiocarpal (wrist) joint, the capsule tends to constrain flexion and extension in a similar way. When a capsular pattern develops, the end ranges of flexion and extension are reduced by about the same amount, so flexion and extension are limited equally. This symmetry distinguishes it from patterns where one direction is more restricted than the other or where non-capsular factors dominate.