[Analyses of tracking movements of the shoulder joint].
The shoulder joint meets human needs by a free motions in all directions with the maximum ROM of human joints. The author gathered data on whether there exists any difference in directional motion ability of the shoulder joint, that is whether the shoulder joint has any functional plane. The difference between the right and left joints was also investigated. Elevating motions from the hanging position and the 90-degree elevated position, respectively, were tested in two directions of the sagittal and scapular planes: the results showed better motions in the scapular plane. Comparison of the right and left joints indicated that the dexterous side (dextral in all cases) moved more favorably. A few sinistral cases were also studied for the difference between the right and left sides, with the results indicating no appreciable difference.
D000328:Adult; D004558:Electric Stimulation; D006801:Humans; D008297:Male; D009068:Movement; D012540:Scapula / Q000502:physiology; D012785:Shoulder Joint / Q000502:physiology*