Nakagaki K, Tomita Y, Sakurai G, Oshiro O, Tamai S, Ozaki J
Department of Orthopedic Surgery, Nara Medical University.
Nihon Seikeigeka Gakkai Zasshi. 1994 Jul;68(7):516-21.
We dissected the 76 shoulders in 38 cadavers to investigate changes in the supraspinatus muscle with a cuff tear and correlated these with age. We made a transverse section in the supraspinatus muscle and stained the section by the van Gieson method. Then we analyzed the changes in the supraspinatus muscle belly with the cuff tear, and by age, measuring the short and long diameter of a slice of the muscle belly and the area of tendon fiber. In the group with a normal cuff, there was a negative correlation between age and the short diameter of the slice of the supraspinatus muscle but no significant correlation between the age and the long diameter of the slice. In the group with a cuff tear, not only the short diameter but also the long diameter of the slice of the supraspinatus muscle decreased with increase in the length of the cuff defect. We concluded that measuring the long diameter of the slice of the supraspinatus muscle was more efficient than measuring the short diameter to evaluate muscle atrophy with a cuff tear. The area of the tendon in the slice increased with the length of cuff defect. The increased area of the tendon may have been responsible for reducing the elasticity in the supraspinatus muscle with a cuff tear.
我们解剖了38具尸体的76个肩部，以研究伴有肩袖撕裂时冈上肌的变化，并将这些变化与年龄相关联。我们在冈上肌处制作横切面，并用凡吉森氏法对该切面进行染色。然后，我们分析了伴有肩袖撕裂时冈上肌肌腹的变化，并按年龄进行分析，测量肌腹切片的短径和长径以及肌腱纤维的面积。在肩袖正常的组中，年龄与冈上肌切片的短径呈负相关，但年龄与切片的长径之间无显著相关性。在伴有肩袖撕裂的组中，随着肩袖缺损长度的增加，冈上肌切片的短径和长径均减小。我们得出结论，在评估伴有肩袖撕裂的肌肉萎缩时，测量冈上肌切片的长径比测量短径更有效。切片中肌腱的面积随着肩袖缺损长度的增加而增大。肌腱面积的增加可能是导致伴有肩袖撕裂的冈上肌弹性降低的原因。
