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

<div>Unusual variations of the tendon of the pectoralis major muscle. (a) An atypical tendinous band (marked by white arrowheads) connecting tendon of the pectoralis major muscle (PMj) with the coracoid process of the scapula. The axillary arch (AA) is stretched between this band and the latissimus dorsi muscle (LD). (b) An accessory head (AH) of the biceps brachii muscle inserted to the tendon of the pectoralis major muscle (place of this insertion is marked by grey arrowhead). DM: deltoid muscle; LH: long head of the biceps brachii muscle; PMi: pectoralis minor muscle; SH: short head of the biceps brachii muscle.</div>

BioMed Research International

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Figure 6

Figure 6: Anatomical Variations of the Pectoralis Major Muscle: Notes on Their Impact on Pectoral Nerve Innervation Patterns and Discussion on Their Clinical Relevance 

Figure 6 | Anatomical Variations of the Pectoralis Major Muscle: Notes on Their Impact on Pectoral Nerve Innervation Patterns and Discussion on Their Clinical Relevance 