Shoulder Anatomy

Clinical Anatomy II - ATTH 5P02

deltoid

O: lateral 1/3 of clavicle, acromion, spine of scapula
I: deltoid tuberosity
A: abduction (shoulder)
N: axillary

trapezius

O: occiput, ligamentum nuchae, spinous processes C7-T12
I: lateral 1/3 of clavicle, acromion, spine of scapula
A: adduction, depression, upward rotation (scapula)
N: accessory, ventral ramus C2-4

latissimus dorsi

O: inferior angle, spinous processes T6-12, last 3-4 ribs, thoracolumbar fascia, posterior iliac crest
I: intertubercular groove
A: extension, adduction, medial rotation (shoulder)
N: thoracodorsal

teres major

O: inferior angle, lower 1/3 of lateral border
I: lesser tubercle
A: extension, adduction, medial rotation (shoulder)
N: lower subscapular

supraspinatus

O: supraspinous fossa
I: greater tubercle
A: abduction (shoulder)
N: suprascapular

infraspinatus

O: infraspinous fossa
I: greater tubercle
A: lateral rotation (shoulder)
N: suprascapular

teres minor

O: upper 2/3 of lateral border
I: greater tubercle
A: lateral rotation, adduction (shoulder)
N: axillary

subscapularis

O: subscapular fossa
I: lesser tubercle
A: medial rotation (shoulder)
N: upper and lower subscapular

rhomboid major

O: spinous processes T2-5
I: medial border
A: adduction, elevation, downward rotation (scapula)
N: dorsal scapular

rhomboid minor

O: spinous processes C7-T1
I: upper medial border
A: adduction, elevation, downward rotation (scapula)
N: dorsal scapular

levator scapula

O: transverse processes C1-4
I: medial border
A: elevation, downward rotation (scapula), lateral flexion, rotation, extension (head and neck)
N: cervical, dorsal scapular

serratus anterior

O: ribs 1-8
I: anterior medial border
A: abduction, upward rotation, depression (scapula)
N: long thoracic

pectoralis major

O: medial half of clavicle, sternum, ribs 1-6
I: greater tubercle
A: adduction, medial rotation (shoulder), flexion (clavicular), extension (sternocostal)
N: lateral and medial pectoral

pectoralis minor

O: ribs 3-5
I: coracoid process
A: depression, abduction, downward rotation (scapula)
N: medial pectoral

subclavius

O: first rib
I: inferior surface of middle 1/3 of clavicle
A: depression (clavicle), elevation (first rib)
N: subclavian

coracobrachialis

O: coracoid process
I: medial surface of mid-humeral shaft
A: flexion, adduction (shoulder)
N: musculocutaneous