- Anatomy:
-
clavicular portion:
- originates off of the medial third of the clavicle and inserts at the lateral lip of the bicipital groove;
-
sternal portion:
- originates off of the superior 2/3 of the sternum and the manubrium, as well as the superior ribs;
- inserts into the lateral lip of the bicipital groove;
-
sternal costal portion:
- originates off the distal edge of the sternum and 5th and 6th ribs;
- Rupture of Pectoralis:
- ruptures usually occur near insertion into greater tubercle;
-
clinical findings:
- following rupture of the pectoralis major muscle, pain, deformity, & weakness are nearly always present, & weakness;
- deformity is minimal when arm is relaxed at the side, but becomes obvious when the muscle contracts;
- early surgical repair is effective and can usually eliminate symptoms in weightlifters;
-
treatment:
- subjective ratings were 96% in the acute group, 93% in the chronic group, and only 51% in the nonoperative group;
- isokinetic testing showed that patients operated on for acute injuries had the highest adduction strength (102% of
the opposite side) compared with patients with chronic injuries (94%) or nonoperative treatment (71%)
- ref: Rupture of the Pectoralis Major Muscle Outcome After Repair of Acute and Chronic Injuries Schepsis et al. Am JSM. Volume 28, Number 1, Jan/Feb 2000
Rupture of the pectoralis major muscle. Kretzler HH, Richardson AB: Am J Sports Med 1989;17:453-458.
Tears of the pectoralis major muscle. Zeman SC, Rosenfeld RT, Lipsomb PR: Am J Sports Med 1979;7:343-347.
Surgical repair of pectoralis major rupture in an athlete. Berson BL: Am J Sports Med 1979;7:348-351.
The Extended Pectoralis Major Myocutaneous Flap: Uses and Indications.
Ruptures of the pectoralis major muscle: An anatomic and clinical analysis. SW Wolfe et al. Am J. Sports Med. Vol 20. 1992. p 587-593.
Rupture of the Pectoralis Major Muscle.
