muscles of the posterior trunk (& shoulder)

origin of the trapezius

occipital bone, thoracic vertebrae

insertion of the trapezius

clavicle, scapula

actions of the trapezius

• elevation/depression of the scapula

• retraction of the scapula

• rotation of the scapula

• elevation of the clavicle

origin of levator scapulae

cervical vertebrae

insertion of levator scapulae

scapula

action of levator scapulae

elevation of the scapula

origin of rhomboid major

thoracic vertebrae

insertion of rhomboid major

scapula

action of rhomboid major

retraction of scapula

origin of rhomboid minor

C7-T1

insertion of rhomboid minor

scapula

action of rhomboid minor

retraction of scapula

origin of supraspinatus

scapula

insertion of supraspinatus

humerus

action of supraspinatus

abduction of humerus

origin of infraspinatus

scapula

insertion of infraspinatus

humerus

action of infraspinatus

lateral rotation of humerus

origin of teres minor

scapula

insertion of teres minor

humerus

action of teres minor

lateral rotation of humerus

origin of subscapularis

scapula

insertion of subscapularis

humerus

action of subscapularis

medial rotation of humerus

origin of teres major

scapula

insertion of teres major

humerus

actions of teres major

adduction, extension, medial rotation of humerus

origin of deltoid muscle

clavicle, scapula

insertion of deltoid muscle

humerus

action of deltoid muscle

abduction of humerus

origins of latissimus dorsi

lower thoracic and all lumbar vertebrae, lumbodorsal fascia, lower ribs

insertion of latissimus dorsi

humerus

action of latissimus dorsi

extension of humerus