TY - JOUR
T1 - Effects of biceps loading and arm rotation on the superior labrum in the cadaveric shoulder
AU - Pradhan, Rabindra L.
AU - Itoi, Eiji
AU - Kido, Tadato
AU - Hatakeyama, Yuji
AU - Urayama, Masakazu
AU - Sato, Kozo
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2000/4
Y1 - 2000/4
N2 - Effects of loading the long head of the biceps brachii (LHB) and arm rotation on the strain of the superior labrum (anterior and posterior) in 10 fresh frozen cadaveric shoulder joints were studied. Loads were applied to the rotator cuff muscles to stabilize the humeral head. The strain of the anterior and posterior portions of the labrum with the biceps loaded with 0.42kg, 1.36kg, and 2.31kg were measured using linear transducers. The humerus was rotated externally (30, 45, 60, and 90°) and internally (30, 45, and 60°) with the arm elevated 60° at glenohumeral joint (simulated 90° elevation of arm to the trunk). The strain increased with an increase in the weight of the load to LHB and with increase in rotation angle both internally and externally. Since the strain in the posterior portion was larger than that of the anterior portion it seems likely that the labrum, especially the posterior portion, is subject to large strain during biceps loading and arm rotation.
AB - Effects of loading the long head of the biceps brachii (LHB) and arm rotation on the strain of the superior labrum (anterior and posterior) in 10 fresh frozen cadaveric shoulder joints were studied. Loads were applied to the rotator cuff muscles to stabilize the humeral head. The strain of the anterior and posterior portions of the labrum with the biceps loaded with 0.42kg, 1.36kg, and 2.31kg were measured using linear transducers. The humerus was rotated externally (30, 45, 60, and 90°) and internally (30, 45, and 60°) with the arm elevated 60° at glenohumeral joint (simulated 90° elevation of arm to the trunk). The strain increased with an increase in the weight of the load to LHB and with increase in rotation angle both internally and externally. Since the strain in the posterior portion was larger than that of the anterior portion it seems likely that the labrum, especially the posterior portion, is subject to large strain during biceps loading and arm rotation.
KW - Biceps loading
KW - SLAP lesion
KW - Strain
KW - Superior labrum
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U2 - 10.1620/tjem.190.261
DO - 10.1620/tjem.190.261
M3 - Article
C2 - 10877508
AN - SCOPUS:0034167896
VL - 190
SP - 261
EP - 269
JO - Tohoku Journal of Experimental Medicine
JF - Tohoku Journal of Experimental Medicine
SN - 0040-8727
IS - 4
ER -