pectoralis major muscle


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Related to pectoralis major muscle: pectoralis minor

pec·to·ra·lis ma·jor mus·cle

(pek'tōr-āl'is mā'jŏr mŭs'ĕl)
Superficial thoracoappendicular muscle of chest; origin, clavicular part (pars clavicularis), medial half of clavicle; sternocostal part [TA] (pars sternocostalis), anterior surface of manubrium and body of sternum and cartilages of first to sixth ribs; abdominal part [TA] (pars abdominalis [TA]), aponeurosis of external oblique; insertion, crest of greater tubercle of humerus; action, adducts and medially rotates arm; nerve supply, anterior thoracic.
Synonym(s): greater pectoral muscle, musculus pectoralis major.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

pectoralis major muscle

Chest wall muscle. Origin: medial half of clavicle, sternum, costal cartilages 4-6. Insertion: lateral edge of bicipital groove of humerus. Nerve: lateral and medial pectoral (C5-T1). Action: adducts and medially rotates arm.
See also: muscle
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Coleman, "Rupture of the pectoralis major muscle: a report of eleven injuries and review of fifty-six," The Journal of Bone & Joint Surgery, vol.
Intramuscular ruptures of the pectoralis major muscle are rare injuries without clear treatment recommendations in the literature.
The pectoralis major muscle was under-developed but the pectoralis minor muscle as well as the anterior serratus muscle were present (Figure-2).
Rupture of the pectoralis major muscle is most commonly a result of an indirect mechanism associated with extensive tension on a maximally contracted muscle.
Intraoperatively, bilateral mastectomies including the right pectoralis major muscle were removed, and bilateral axillary clearance was carried out.
We performed an anterior thoracotomy and mobilized the pectoralis major muscle. The herniated lung was exposed (Figure 2).
latissimus dorsi strengthening (insufficient), may contribute towards a shortened pectoralis major muscle. This may also be exaggerated by insufficient stretching of the pectoralis major muscle.
Once SSM has been completed, breast reconstruction commences with an incision along the lateral border of the pectoralis major muscle, and a submuscular pocket is created deep to both the pectoral and serratus muscles.
Resch H, Povacz P, Ritter E, Matschi W 2000 Transfer of the pectoralis major muscle for the treatment of irreparable rupture of the subscapularis tendon Journal of Bone & Joint Surgery (Am) 82 (3) 372-82
The representative volume of the pectoralis major muscle was obtained and mirrored using MIMICS, and a prototype built of the volume.