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Bi- and three-dimensional CT study of carpal bone motion occurring in lateral deviation
1Laboratoire d'Anatomie Fonctionnelle, Université Libre de Bruxelles, Belgium.
Surgical and Radiologic Anatomy : SRA
|January 1, 1992
Summary
This computed tomography (CT) study analyzed carpal bone motion during wrist deviation. Key wrist bones show limited mobility, with specific muscles aiding carpal stability.
Area of Science:
- Orthopedics
- Radiology
- Anatomy
Background:
- Understanding carpal bone motion is crucial for diagnosing wrist injuries and conditions.
- Previous models of carpal structure and function have limitations.
Purpose of the Study:
- To qualitatively analyze carpal bone motion using computed tomography (CT).
- To investigate the role of specific wrist muscles in carpal stability.
- To propose an updated model of the carpus's longitudinal functional structure.
Main Methods:
- Computed tomography (CT) scans of 15 volunteers' right wrists and 5 anatomical preparations.
- Scans were performed in neutral, radial (15°), and ulnar (30°) deviation.
- CT data were analyzed and reconstructed in 3D using the Philips CAMRA S100 program.
Main Results:
- The capitate, metacarpals II and III, trapezium, and trapezoid demonstrated limited mobility.
- The flexor and extensor carpi ulnaris muscles play a significant role in internal carpal stability.
- The pisiform bone was confirmed as a sesamoid bone within the flexor carpi ulnaris tendon.
Conclusions:
- Specific carpal bones exhibit restricted motion, influencing overall wrist biomechanics.
- The flexor and extensor carpi ulnaris muscles are vital for maintaining carpal stability.
- A new longitudinal functional model of the carpus during lateral deviation is proposed, bridging existing theories.