Anatomical Variations of the Pectoralis Major Muscle: Notes on Their Impact on Pectoral Nerve Innervation Patterns and Discussion on Their Clinical Relevance

<div>Anatomical variations related to the pectoralis major muscle. (a) Atypical division of PM into two almost completely separate portions is visible at the level of the sternal angle. (b) Presence of the sternalis muscle (SM). CL: clavicular part of the pectoralis major muscle; DM: deltoid muscle; STC: sternocostal part of the pectoralis major muscle.</div>

BioMed Research International

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Figure 2: Anatomical Variations of the Pectoralis Major Muscle: Notes on Their Impact on Pectoral Nerve Innervation Patterns and Discussion on Their Clinical Relevance 

Figure 2 | Anatomical Variations of the Pectoralis Major Muscle: Notes on Their Impact on Pectoral Nerve Innervation Patterns and Discussion on Their Clinical Relevance 