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. 2022 Sep 21;10(9):23259671221121333. doi: 10.1177/23259671221121333

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© The Author(s) 2022

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License (https://creativecommons.org/licenses/by-nc-nd/4.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 4. — The posterior surface of the pectoralis major (PM) humeral insertion after reflecting the muscle (left shoulder). Landmarks on the humerus included the proximal and distal points of the SH (S1, S2) and CH insertions (I1, I2). The total PM footprint length is calculated from S1 to I2, and the SH and CH of PM tendon footprint lengths (S1 to S2 and I1 to I2, respectively). The distance from the proximal border of the SH insertion to the proximal border of the CH insertion of the PM (S1 to I1), and the overlapping distance between these 2 head insertions (I1 to S2). H, humerus; CH, clavicular head of the PM; Co, coracoid process; I1 and I2, the proximal and distal points of clavicular head insertion; S1 and S2, the proximal and distal points of sternal head insertion; SH, sternal head of the PM.