UE Shoulder Muscles Flashcards
Trapezius
PA: sup. nuchal line, EOP,
nuchal lig. Sp C7-T12
DA: clavicle, acromion process,
scapular spine
Act: elevate, depress, retract
scapula
Inn: spinal accessory n (CN XI)
Levator scapulae
PA: tp C1-C4
DA: medial border of scapula
Act: elevate scapula, inferiorly
rotate glenoid cavity
Inn: dorsal scapular n
Latissimus dorsi
PA: sp T7-T12,
thoracolumbar fascia,
iliac crest
DA: intertubercular sulcus
Act: extend, adduct, medially
rotate humerus
Inn: thoracodorsal n
Rhomboid major and minor
PA: sp T2-T5, nuchal lig. (maj)
sp C7 & T1 (min)
DA: medial border of scapula
Act: retract scapula, inferiorly
rotate glenoid cavity
Inn: dorsal scapular n
Pectoralis major
PA: clavicle, sternum, costal cartilage 1-6
DA: intertubercular sulcus
Act: adduct, medially rotate humerus
Inn: medial & lateral pectoral nn
Pectoralis minor
PA: ribs 3-5
DA: coracoid process
Act: stabilize scapula
Inn: medial pectoral n
Serratus anterior
PA: ribs 1-8
DA: medial border of scapula
Act: protract scapula
Inn: long thoracic n
Deltoid
PA: clavicle, acromion, scapular spine
DA: deltoid tuberosity
Act: abduct, medially rotate humerus
Inn: axillary n
Supraspinatus
PA: supraspinous fossa
DA: greater tubercle of humerus (superior facet)
Act: initiates abduction of humerus
Inn: suprascapular n
Infraspinatus
PA: infraspinous fossa
DA: greater tubercle (inferior facet)
Act: laterally rotates humerus
Inn: suprascapular n
Teres minor
PA: lateral border of scapula
DA: greater tubercle (inferior facet)
Act: adducts and laterally rotates humerus
Inn: lower subscapular n
Teres major
PA: inferior angle of scapula
DA: intertubercular sulcus
Act: adducts and medially rotates humerus
Inn: long thoracic n
Subscapularis
PA: subscapular fossa
DA: lesser tubercle
Act: medially rotates & adducts humerus
Inn: upper & lower subscapular nn
