In activities of daily living such as eating meals, the neck and upper limbs move in coordination. However, no methods have been established to analytically and quantitatively capture motion of the neck and limbs during these activities. We used a Vicon 512 system to simultaneously measure ranges of motion (ROMs) for the cervical spine, shoulders, elbows, and forearms. Correlations between the motion analyzer and the universal goniometer were >0.76. Repeatability of measurements using this analyzer were
These facts suggest that the pathogenesis of tumorous calcification causing carpal tunnel syndrome is comparable with that of calcifying tendinitis of the rotator cuff in which a cell-mediated reactive process plays an important role at the tendon insertion.
In activities of daily living such as eating meals, the neck and upper limbs move in coordination. However, no methods have been established to analytically and quantitatively capture motion of the neck and limbs during these activities. We used a Vicon 512 system to simultaneously measure ranges of motion (ROMs) for the cervical spine, shoulders, elbows, and forearms. Correlations between the motion analyzer and the universal goniometer were >0.76. Repeatability of measurements using this analyzer were
Subluxation of the distal radioulnar joint (DRUJ) is associated with extensor tendon rupture in patients with rheumatoid arthritis (RA). However, it remains difficult to quantitatively evaluate DRUJ subluxation in RA wrist. We devised a new method for assessing DRUJ subluxation. This study investigated whether the new method, known as the RA subluxation ratio (RASR), or a conventional method was superior for detecting extensor tendon rupture in the RA wrist. Thirty-five RA wrists and 10 wrists of healthy volunteers were scanned using computed tomography. The RA wrists were divided into a tendon rupture group and a nonrupture group. The dorsal surface of the distal radius from Lister's tubercle to the ulnar aspect of the distal radius maintains a planar surface in the RA wrist. Therefore, we defined the RASR as the extent of dorsal subluxation of the ulna relative to this plane. We quantified subluxation of the DRUJ by using the RASR or the modified radioulnar line method, and compared the two methods. The RASR was 0.440 in the rupture group, 0.333 in the nonrupture group, and 0.106 in the healthy volunteers. The RASR was significantly higher than the modified radioulnar line method in the sensitivity of diagnosing tendon rupture.
Subluxation of the distal radioulnar joint (DRUJ) is associated with extensor tendon rupture in patients with rheumatoid arthritis (RA). However, it remains difficult to quantitatively evaluate DRUJ subluxation in RA wrist. We devised a new method for assessing DRUJ subluxation. This study investigated whether the new method, known as the RA subluxation ratio (RASR), or a conventional method was superior for detecting extensor tendon rupture in the RA wrist. Thirty-five RA wrists and 10 wrists of healthy volunteers were scanned using computed tomography. The RA wrists were divided into a tendon rupture group and a nonrupture group. The dorsal surface of the distal radius from Lister's tubercle to the ulnar aspect of the distal radius maintains a planar surface in the RA wrist. Therefore, we defined the RASR as the extent of dorsal subluxation of the ulna relative to this plane. We quantified subluxation of the DRUJ by using the RASR or the modified radioulnar line method, and compared the two methods. The RASR was 0.440 in the rupture group, 0.333 in the nonrupture group, and 0.106 in the healthy volunteers. The RASR was significantly higher than the modified radioulnar line method in the sensitivity of diagnosing tendon rupture.
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