Additional studies have evaluated the role of the intrinsic musculature within and surrounding the carpal tunnel in the etiology of CTS. Most of these studies have evaluated the muscles as space occupying lesions that add to the pressure within the carpal tunnel. The investigators believe that some of the muscles described, specifically those that are found within the transverse carpal ligament and that cross the area of the carpal tunnel, actually have a dynamic role in the etiology of CTS, especially in manual laborers that use their hands in a forceful manner in a repetitive fashion. It is also possible that this anatomic variant (muscles crossing the area of the carpal tunnel) is related to the "square "hand configuration and that this dynamic contribution to the pressure within the carpal tunnel is the reason for the increased incidence of CTS in these patients. The purpose of this study is to quantify the amount of muscle crossing the area of the carpal tunnel in normal individuals and to compare it to the amount of muscle in the wrists of patients with CTS.