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.

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
References in periodicals archive ?
An unusual case of an intramuscular lipoma of the pectoralis major muscle simulating a malignant breast mass.
The four essential features of this condition are 1) unilateral shortening of the index, long, and ring fingers, 2) syndactyly of the affected digits, 3) hypoplasia of the hand, and 4) absence of the sternocostal portion of the ipsilateral pectoralis major muscle.
17] However, with a few simple maneuvers, tilting the trunk forward, elevating the rib cage and coordinating contraction of the latissimus dorsi and pectoralis major muscles with the arms adducted improves expiratory function.
Measurements of meat quality characteristics made on the raw pectoralis major muscle of the broiler breast include pH, water holding capacity (WHC) and color coordinates ([L.
Wearing 60 pounds of gear, Ramos ripped his right pectoralis major muscle under the water pressure and completely detached it from the humerus bone.
2003) demonstrated that various subgroups of turkey satellite cells derived from pectoralis major muscle respond differently to mitogenic stimuli.
The practice of placing breast implants under the pectoralis major muscle depends on individual breast anatomy and the type of breast implants selected.
Deficiency in lysine reduced body growth and had an effect on the development of the pectoralis major muscle and the sartorius muscle in growing chickens (Tesseraud et al.
Contribution of rigor shortening and cold shortening to variability in the texture of Pectoralis major muscle from commercially-processed broilers.
Both the 42 mm Grammont and 42 mm Equinoxe[R] rTSA prostheses significantly decreased the mean force required by the infraspinatus, teres minor, total posterior cuff, and pectoralis major muscles and also significantly decreased the mean joint reaction force during scapular abduction with the elbow flexed to 90[degrees] relative to the native joint with a rotator cuff tear (supraspinatus), (Table 1).
As shown in Figure 6, even at the beginning of the 25-second period, muscle activity was close to 80% for the biceps and triceps muscle as well as the pectoralis major muscles.