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The Anatomic Relationship of the Distal Oblique Bundle to the Sensory Branches of the Anterior Interosseous Nerve, A Cadaveric Study
Sonu Jain, MD
Andrew Rust, BS
The Ohio State College of Medicine
2022-01-15
Presenter: Andrew Rust BS
Affidavit:
NA
Director Name: NA
Author Category: Fellow Plastic Surgery
Presentation Category: Clinical
Abstract Category: Hand
The anterior interosseous nerve (AIN) is a common cause of volar-sided wrist pain, making it a commonly targeted nerve in denervation procedures of the wrist. Its path down the wrist takes it past the distal oblique bundle (DOB) of the interosseous membrane (IOM), an isometric stabilizer of the distal radioulnar joint (DRUJ). In this study we aimed to describe the relationship between the AIN and the DOB to provide guidance for denervation procedures of the wrist, helping to avoid DRUJ instability.
This study was performed on 5 fresh frozen forearms. Measurements were recorded using digital calipers. Overlying tissue was removed and the location of the AIN relative to several anatomical landmarks was recorded. The anatomy of the DOB was also recorded.
We found that proximal to the DOB, the AIN runs closer to the radius (p = 0.028). Distal to the DOB, there was no difference in the distance from the AIN to the radius or ulna (p = 0.64); the AIN ran down the center of the IOM.
We also described the anatomy of the DOB. The DOB runs from the ulna proximally to the radius distally (p=0.002). From the dorsal ulnar corner of the radius, the distance to the DOB origin on the ulna is 43.40ą4.64mm and the distance to the DOB insertion on the radius is 27.74ą8.93mm. The DOB was measured to be 17.36ą2.8mm long from origin to insertion and 11.22ą3.06mm wide in its most central portion.
