Original articlesWristCarpal bone size and scaling in men versus in women
Section snippets
Subjects and image acquisition
With approval from our Institutional Review Board and after obtaining informed consent, 28 volunteers were recruited for study. Potential volunteers were eligible for inclusion if they were between the ages of 18 and 30 years and had no history of wrist injury or chronic disease that might affect the soft tissues in the wrist. Subjects specifically were excluded if they had a history of wrist or forearm fracture, prior wrist surgery, or severe osteoarthritis or connective tissue disease. At
Results
Our first analysis revealed that the rank order of each carpal volume was the same in the men and women and that on average the carpal bones in the men were larger than those in the women (Fig. 3A, Table 1). For both genders the capitate was the largest bone, followed by the hamate, scaphoid, trapezium, lunate, triquetrum, trapezoid, and pisiform. On average the volumes of the carpal bones in the women were 38% smaller than the corresponding carpal volumes in the men; the difference was largest
Discussion
This study was performed as a first step in determining whether the gender-related differences in carpal size are caused by scaling or whether they represent more complex changes in carpal shape. Our data suggest that the differences primarily are caused by simple scaling. Although we did find gender-related differences in carpal volume for each of the 8 carpal bones, those differences vanished when we compared the normalized volumes of the bones (ie, the relative amount of the carpus that each
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Supported by a National Institutes of Health grant (AR44005).
No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.