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. Author manuscript; available in PMC: 2017 Apr 4.
Published in final edited form as: Nat Protoc. 2015 Oct 22;10(11):1802–1819. doi: 10.1038/nprot.2015.119

Figure 11.

Figure 11

Pectoralis muscle. (a,b) Two views of the pectoralis muscle. The two views indicate how changing the illumination path and angle view with the surgical microscope can help to clearly identify the pectoralis muscle. P, pectoralis muscle. R, rib. IC, fourth intercostal space. Care needs to be taken to not injure the muscle if survival surgery is planned (Step 27). All animal procedures and protocols were approved by the Institutional Animal Care and Use Committee of the Massachusetts General Hospital, and they are in accordance with the NIH Guide for the Care and Use of Laboratory Animals.