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MicroScribe 3D Analysis of the Rotator Cuff Muscles Compared to MRI Reconstruction
Author(s) -
Jorgensen Adam,
Avondet McKay,
Gardiner Brett,
Robison Scott,
Wisco Jonathan
Publication year - 2015
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.29.1_supplement.545.6
Subject(s) - rotator cuff , scapula , anatomy , shoulders , cadaveric spasm , medicine , humerus , supraspinatus muscle , magnetic resonance imaging , radiology , surgery
We mapped and defined the attachments and fiber orientations of the rotator cuff muscles of the right and left shoulders of a 58‐year‐old male cadaveric specimen. A better understanding of the complex attachments and inter‐relationships of these muscles will contribute to improvements in rotator cuff surgery and endoscopic repairs. We performed high‐resolution Magnetic Resonance Imaging (MRI) of the right and left shoulders allowing three‐dimensional (3D) reconstruction of the scapula, humerus, and rotator cuff muscles using the reconstruction software Amira. We then dissected the supraspinatus (SS), infraspinatus (IS), teres minor (TM), subscapularis (SUB), acquired spatial maps of the muscle fibers using the MicroScribe 3D Digitizer, and reconstructed the data into 3D renderings using Autodesk Maya. This data was overlaid onto MRI reconstructions of each muscle, offering complete visualization of muscle fiber attachments on the scapula and humerus. The distal attachments and interactions of SS, IS, and TM muscle fibers on the greater tubercle (GT) were visualized in 3D in near microscopic detail. Microscribe 3D analysis captures a more complete perspective of muscle fiber attachments then does its MRI reconstructed counterpart. Typical MRI reconstructions give a general body to the muscles analyzed, but are not detailed enough to show total attachment of muscle to bone. With this enhanced view of muscle fibers, we observed several unique muscle attachments that should be considered in surgical repair of the rotator cuff. Our rendering of the SS, IS, and TM at the distal attachment point on the GT will be beneficial in endoscopic repair of rotator cuff injuries.