pectoralis minor


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pectoralis minor

a thin triangular muscle of the upper chest wall beneath the pectoralis major. The base arises from the third, fourth, and fifth ribs on their upper outer surfaces. It inserts as a flat tendon into the coracoid process of the scapula. It functions to rotate the scapula, to draw it down and forward, and to raise the third, the fourth, and fifth ribs in forced inspiration. Compare pectoralis major, subclavius.
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Pectoralis minor

pectoralis minor

A muscle beneath the pectoralis major, attached to the coracoid process of the scapula that depresses as well as causes anterior tipping of the scapula.
See also: pectoralis
References in periodicals archive ?
The pectoralis major appears thick, and overlies pectoralis minor, with a strongly reflective hyperechogenic perimysium often separating the two muscles.
The thoracic deformity is variable, but in all patients with the syndrome the costal head of the pectoralis major is absent, and in many the pectoralis minor is absent.
Key trigger point Associated satellite trigger point sternocleidomastoid temporalis, masseter upper trapezius temporalis, masseter scalene deltoid, extensor carpi radialis, extensor digitorum communis splenius capitis temporalis supraspinatus deltoid, extensor carpi radialis infraspinatus biceps brachii pectoralis minor flexor carpi radialis, flexor carpi ulnaris latissimus dorsi triceps brachii, flexor carpi ulnaris serratus posterior superior triceps brachii, extensor digitorum communis, extensor carpi ulnaris quadratus lumborum gluteus maximus, piriformis piriformis hamstrings hamstrings gastrocnemius, soleus
In Case 1, a subacromial-subdeltoid abscess gave a false impression of intra-articular glenohumeral septic arthritis, due to extension anteriorly into the plane between the subscapularis and pectoralis minor (subacromial-subdeltoid abscess can also extend posteriorly into the supraspinous fossa).