Thomazeau H, Duval J M, Darnault P, Dréano T
Laboratoire d'Anatomie, Université Rennes, France.
Surg Radiol Anat. 1996;18(3):221-5. doi: 10.1007/BF02346130.
Ten anatomical preparations and 15 MRI scans (Magnetic Resonance Imaging) performed on healthy subjects were used to define accurately the lateral attachments and anatomical boundaries of the supraspinatus m. Using 5 frozen specimens sectioned in the plane corresponding to the sagittal oblique MRI plane, it was possible to calculate quantitatively the ratio between the bony contours (O) and muscles (M) of the supraspinous fossa. This ratio was maximal (O/M = 2.4) for the section passing through the plane which included the coracoid process anteriorly and the spine of the scapula posteriorly ("Y" section). Five dissections on unembalmed subjects demonstrated that the postero-lateral origin of supraspinatus m. extended further laterally than classically described. This observation was confirmed in the 15 MRI subjects which showed that the supraspinatus m. may arise as far laterally as the "Y" section on MRI in 53% of cases. A quantitative evaluation of atrophy of the supraspinatus m. using MRI is possible with a knowledge of these two parameters.
对健康受试者进行了10次解剖标本制备和15次磁共振成像（MRI）扫描，以准确界定冈上肌的外侧附着点和解剖边界。使用5个在与矢状斜位MRI平面相对应的平面上切片的冷冻标本，可以定量计算出冈上窝的骨轮廓（O）与肌肉（M）之间的比例。对于通过包含前方喙突和后方肩胛冈的平面的切片，该比例最大（O/M = 2.4）（“Y”切片）。对未防腐处理的受试者进行的5次解剖显示，冈上肌的后外侧起点比经典描述的更向外侧延伸。这一观察结果在15名MRI受试者中得到证实，结果显示在53%的病例中，冈上肌在MRI上的起点可能与“Y”切片一样靠外侧。了解这两个参数后，就可以使用MRI对冈上肌萎缩进行定量评估。
