Myology of the Shoulder Flashcards

Deltoid tuberosity
Terms Definitions
Upper Trapezius
Prox - External occipital protuberance, medial third of the superior nuchal line, ligamentum nuchae, spinous process of c 7

Distal - Lateral third of clavicle, medial aspect of acromion process

Act - elevation and upward rotation of scapula

Nerv - spinal acccessory nerve and ventral rami of c2 - 4

Art - transverse cervical a.
Middle Trapezius
Prox - spinous processes of T1-5

Distal - medial edge of acromion and superior edge of scapular spine

Act - retraction of scapula

Nerv - spinal accessory n. and ventral rami of c2-4

Art - tranverse cervical a.
Lower trapezius
Prox - spinous processes of T6-12

Distal - medial end of the scapular spine

*Act - scapular depression, retraction, and upward rotation *

Nerv - spinal accessory n. and ventral rami of c2-4

Art - transverse cervical a.
Latissimus dorsi
Prox - inferior angle of scapula, 9th - 12th ribs, spinous process of t7-12, thoracolumbar fascia, post 1/3 of iliac crest

Dist - intertubercular groove of humerus

Act - Ext, add, and IR

Nerv - Thoracodorsal n. (C6, C7, C8)

Art - Thoracodorsal a.
Posterior Deltoid
Prox - Spine of scapula

Dist - Deltoid tuberosity of humerus

Act - Abd, ER, and ext of humerus

Nerv - Axillary n (C5, C6)

Art - Posterior circumflex humeral a.
Medial Deltoid
Prox - Lateral end of acromion

Dist - Deltoid tuberosity of humerus

Act - Abd

Nerv - Axillary n. (C5, C6)

Art - Posterior circumflex humeral a.
Anterior Deltoid
Prox - Distal anterior-lateral surface of the clavical

Dist - Deltoid tuberosity of humerus

Act - Abd, IR, and flex of humerus

Nerv - Axillary n. (C5, C6)

Art - Posterior circumflex humeral a.
Teres Major
Prox - dorsal surface of lower third of lateral boarder of scapula

Dist - crest of lesser tubercle of the humerus

*Act - IR, Add, Ext of humerus*

Nerv - lower subscapular nerve (C5, C6[primary], C7)

Art - subscapular a. and posterior circumflex humeral a.
Levator Scapulae
Prox - transverse process of C1-4

Dist - superior angle to medial boarder of the scapula

Act - elev scapula, ipsilateral flex of head

Nerv - ventral rami of C3-4, dorsal scapular n. (C3, C4, C5)

Art - dorsal scapular a.
Rhomboid Major
Prox - spinous process of T2-5

Dist - medial boarder of scapula below scapular spine

*Act - scapular retractions, elevation, and downward rotation *

Nerv - dorsal scapular n. (C4, C5[primary])

Art - dorsal scapular a.
Rhomboid Minor
Prox - spinous process of C7-T1

Dist - medial boarder of scapula adjacent to scapular spine

*Act - scapular retractions, elevation, and downward rotation *

Nerv - dorsal scapular n. (C4, C5[primary])

Art - dorsal scapular a.
Supraspinatus
Prox - supraspinatous fossa

Dist - suprerior facet of the greater tubercle of the humerus

Act - Abd of humerus

Nerv - suprascapular n. (C4, C5 & C6[both primary])

Art - Suprascapular a.
Infraspinatus
Prox - infraspinatus fossa

Dist - middle facet of the greater tubercle of the humerus

Act - ER of humerus

Nerv - Suprascapular n. ( C5, C6)

Art - Suprascapular a.
Teres Minor
Prox - posterior surface of lateral boarder of scapula

Dist - lower facet of the greater tubercle of humerus

*Act - ER and Add of arm*

Nerv - axillary n. (C5, C6)

Art - circumflex scapular and posterior circumflex humeral a.
Serratus Anterior
Prox - External surface of the lateral region of ribs 1-9

Dist - Medial boarder of scapula from superior to inferior angles

Act - upward rotation of scapula protraction of scapula

Nerv - long thoracic n. (C5, C6 & C7 & C8 [First three primary])

Art - Long thoracic a.
Pectoralis Major - Clavicular Head
Prox - medial half of clavical

Dist - crest of greater tubercle of humerus

Act - Add, IR, Flex of humerus

Nerv - lateral pectoral n. (C5, C6)

Art - pectoral branch of thoracoacromial trunk
Pectoralis Major - Sternal Head
Prox - manubrium and cartilage on ribs 1-6

Dist - crest of greater tubercle of humerus

Act - Add, IR, Flex of humerus

Nerv - lateral and medial pectoral n. (C6, C7, C8 & T1[last two primary])

Art - pectoral branch of thoracoacromial trunk
Pectoralis Minor
Prox - external surface of ribs 3-5

Dist - coracoid process

Act - protraction of scapula

Nerv - medial pectoral n. (C7, C8[primary], T1)

Art - pectoral branch of thoracoacromial trunk
Coracobrachilais
Prox - Coracoid process of the scapula

Dist - upper 1/3 of frontal humerus

Act - flex, Add, IR and GH of humerus

Nerv - musculocutaneous n. (C6, C7)

Art - brachial a.
Subclavius**
Prox - external surface of the junction of the 1st rib and its costal cartilage

Dist - inferior surface in the middle clavicle region

Act - brings clavicle down and forward, elevates 1st rib

Nerv - subclavian n. (C5, C6)

Art - clavicular branch of thoracoacromial a.
Subscapularis
Prox - subscapular fossa

Dist - lessor tubercle of the humerus, glenohumeral capsule

*Act - IR and Ext of humerus *

Nerv - Upper and lower subscapular n. (C5 & C6[first two primary], C7)

Art - Subscapular a.
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