This study evaluates the influence of wrist kinematics on the morphology and dimensions of the ulnar tunnel, a crucial area for ulnar nerve function. By analyzing 30 formalin-preserved cadaver hands, the study investigates the changes in the ulnar tunnel’s compartments—proximal, middle, and distal—across various wrist positions, including flexion, extension, radial, and ulnar deviations. Results indicate significant alterations in the tunnel’s dimensions, particularly during wrist flexion and ulnar deviation, where the tunnel length and width decrease, impacting the ulnar nerve and its surrounding structures.
The ulnar tunnel is a dynamic structure, with all compartments influenced by wrist motions. These findings highlight the importance of wrist positioning in diagnosing and treating conditions related to ulnar nerve compression and entrapment. Understanding these dynamic changes could guide surgeons in improving outcomes during ulnar tunnel surgeries and addressing nerve compression syndromes.
