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Imaging

Imaging of the soft tissue injury in pectoralis major ruptures can be difficult. Plain x-rays can reveal bone avulsions, or loss of the pectoralis shadow. Ultrasound exam can demonstrate intra-muscular injury or loss of continuity of the tendon . CT scan can outline the muscle, but has difficulty visualizing the distal soft tissue of the […]

Clinical Evaluation

The most common mechanism for sustaining a pectoralis muscle injury is from weight-lifting or athletics. Wolfe et al.It described the transition period from eccentric loading to concentric loading (bench press position) as the most stressful to the inferior muscle fibers of the pectoralis muscle. The patient typically presents after sudden onset of pain in the […]

Anatomy

The anatomy of the pectoralis major muscle demonstrates two distinctively different parts—the clavicular head and the sternal head . We feel that when evaluating injuries to the pectoralis it is important to understand the anatomy of the pectoralis major muscle complex.

Unfortunately, many of the published reports never comment on this difference, or describe it […]

Pectoralis Major Tendon Ruptures

Key Points

The pectoralis major muscle demonstrates two distinctively different parts—the clavicular head and the sternal head. The clavicular head arises from the medial clavicle and upper sternum. It is supplied by the pectoral nerve off of the lateral cord and the deltoid branch of the thoraco-acromial artery. The sternal head arises from the sternum, […]

Pectoralis Muscle Rupture

SYMPTOMS

Sudden onset of localised pain in the anterior part of the shoulder and upper arm after excessive abduction and external rotation such as in a rugby tackle. There is weakness on internal rotation and forward flexion.

AETIOLOGY

The pectoralis muscle insertion at the upper humerus or muscle bulk can rupture partially or completely.

CLINICAL […]