pectoralis major


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Related to pectoralis major: latissimus dorsi, pectoralis minor

pectoralis major

[pek′tərā′lis, pek′tərəlis′]
Etymology: L, pectus, breast
a large muscle of the upper chest wall that acts on the joint of the shoulder. Thick and fan-shaped, it arises from the clavicle, the sternum, the cartilages of the second to the sixth ribs, and the aponeurosis of the obliquus externus abdominis. It serves to flex, adduct, and medially rotate the arm in the shoulder joint.
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Pectoralis major

pectoralis major

A large triangular muscle that extends from the sternum to the humerus and functions to flex, horizontally adduct, and internally rotate the arm, and aids in chest expansion when the upper extremities are stabilized.
See also: pectoralis
References in periodicals archive ?
Various muscle transfers such as trapezius, pectoralis major and teres major, latissimus dorsi, combined biceps and triceps, gracilis, and combined muscle transfers have been used in the secondary reconstruction of the shoulder.
The lower activity of the pectoralis major (~40%) can be explained by the fact that the sternal portion evaluated is not involved with shoulder abduction.
2009) considered the acute effects of performing an isolation exercise for the pectoralis major prior to completion of a compound chest exercise.
Devereaux, "A systematic review and comprehensive classification of pectoralis major tears," Journal of Shoulder and Elbow Surgery, vol.
UPPER CROSSED SYNDROME MUSCULATURE Overly facilitated Overly inhibited ("tight") muscles ("weak") muscles Pectoralis major Rhomboids Pectoralis minor Middle and lower trapezius Subclavius Serratus anterior Upper trapezius Longus colli and capitis (deep neck flexors) Levator scapulae Infraspinatus and teres minor Sternocleidomastoid Thoracic paraspinals (SCM) Suboccipital group Table 2.
A coloraqao do musculo Pectoralis major foi determinada na parte interna deste, visando a evitar efeitos do processo de abate.
Rupture of the pectoralis major muscle is most commonly a result of an indirect mechanism associated with extensive tension on a maximally contracted muscle.
Transverse incision was made below the hairline between the Pectoralis major anteriorly and the latissimus dorsi muscle posteriorly, then deepened to the external intercostals fascia.
The role of pectoralis major muscle flap in salvage total laryngectomy," Archives of Otolaryngology--Head and Neck Surgery, vol.
He was treated with Composite resection with modified Radical Neck Dissection and reconstruction with Pectoralis major Myocutaneous Flap.