What to Know About the Pectoral Muscle and a Pectoral Tear
The pectoral muscle is a powerful, large muscle located at the front of the chest. It allows the arm to rotate inward, move closer to the body and move forward and backward. The pec muscle originates from two points, the sternum (breastbone) and the clavicle (collarbone). These two points come together into the pectoralis major tendon, which is attached to the humerus bone of the upper arm near the biceps tendon. The pectoral muscle is strong but a pec tear can occur in athletes and other active individuals. Patients who have experienced a pectoral tear in the Van Nuys, Thousand Oaks and Los Angeles, California area are encouraged to visit Dr. Mark Getelman, shoulder specialist, for a diagnosis and treatment plan.
A pectoral tear is most commonly found in male athletes due to weight training and other athletic activities and generally occurs during a bench press or eccentric contraction. Eccentric contraction is defined as external force on the muscle that is greater than the muscle can generate. Pectoral tendon tears are commonly found in men between the ages of 20 to 40 years.
A pec tear may occur in in the following pectoral muscle areas:
- Tendon tear off the humerus (most common injury)
- Tear at the muscle and tendon connection
- Tear within the actual muscle
- Muscle tear off the sternum (least common injury)
Pectoral Tear Symptoms
The hallmark symptom of a pectoral tear is a sudden, sharp pain located at the front of the upper arm at the pec muscle tendon attachment site. Patients may also experience swelling and bruising, as well as visible deformity in the pectoral area. Tears can initially be missed and dismissed as a mild strain; however, as the bruising and swelling resolve the deformity is noted and consultation with a specialist is requested.
Pectoral Tear Diagnosis
Dr. Getelman will diagnose a pec tear during a physical examination. In most cases, the shape and bulk of the injured muscle is visibly different than the uninjured muscle. During the exam, Dr. Getelman will attempt to rotate and move the arm to determine pain level and exact location. A series of X-rays and/or an MRI may also be performed to confirm the diagnosis.