pectoralis major muscle

(redirected from Pectoralis muscle)

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 ?
By placing an appropriate sized implant under the pectoralis muscle at the time of mastectomy the patient can have an immediate result that creates a masculine appearing chest.
The patient should be made aware of the possibilities that the target lesion may not be visualized or may be inaccessible, as in the setting of lesions in close proximity to the pectoralis muscle or near the nipple or skin.
The diameters of thigh and pectoralis muscle fibers were higher in birds with the combined genotypes of GG-TT and TT-CT.
Blunt dissection under the inferior edge of the pectoralis muscle is performed, palpating the anteromedial humerus and identifying the biceps tendon in the groove.
Associated distortion and tenting of the underlying pectoralis muscle were also noted (Figures 1 and 2).
The weakened scar tissue was easily torn, and the strength of the pectoralis muscle pushed the implant deep into her chest," he added.
Intramuscular lipomas arising specifically from the pectoralis muscle are exceedingly rare.
Right pectoralis muscle samples were rapidly removed and flash frozen in liquid nitrogen prior to storage (-80[degrees]C).
For instance, 'cloud gate' near the pectoralis muscle can assist breathing and the chest, but its other description refers to standing on a mountain top and seeing a new perspective.
Analyses of the pectoralis muscle data were performed and surgical planning for one of the studies performed to see the visual effect of such an operation.
Implant reconstruction is typically preceded with a tissue expander (TE) placed deep to the pectoralis muscle and expanded on a weekly or biweekly basis until approximately 30 percent over-expansion is reached (6).
This structure was separated from the underlying pectoralis muscle by a thin band of fat (Fig.