Shoulder Flashcards
upper trapezius origin
external occipital protuberance, medial half of the superior nuchal line, ligamentum nuchae, spinous process of 7th cervical vertebrae

upper trapezius insertion
lateral 1/3 of the clavicle

upper trapezius nerve supply
spinal portion of the accessory nerve (CN XI), ventral rami of C3, C4 Nerve root: C1-5
upper trapezius function
scapular elevation; upward rotation of the scapula (in conjunction with the inferior fibers)

levator scapulae origin
transverse processes of the upper 4 cervical vertebrae

levator scapulae insertion
vertebral border of the scapula, between the superior angle and the root of the scapular spine

levator scapulae nerve supply
dorsal scapular nerve C3, C4 Nerve root: C3, C4, C5

levator scapulae function
scapular elevation, adduction, downward rotation

middle trapezius origin
spinous processes for T1-T5 and intervening supraspinal ligament

middle trapezius insertion
medial border of the acromion process and the spine of the scapula

middle trapezius nerve supply
spinal portion of the accessory nerve (CN XI); ventral rami of C3, C4 Nerve root: C1-C5

middle trapezius function
scapular adduction

lower trapezius origin
spinous process of T6-T12 and intervening supraspinous ligament

lower trapezius insertion
tubercle on the medial end of the scapular spine

lower trapezius nerve supply
spinal portion of the accessory nerve (CN XI); ventral rami of C3, C4. Nerve root: C1-C5

lower trapezius function
scapular depression, upward rotation of the scapula (in conjunction with the superior fibers)

rhomboid major origin
spinous process of T2-T5 and intervening supraspinous ligament

rhomboid major insertion
vertebral border of the scapula between the spine and inferior angle

rhomboid major nerve supply
dorsal scapular n. C5

rhomboid major function
adduction, downward rotation, and elevation of the scapula

rhomboid minor origin
spinous process of C7 and T1 and the inferior aspect of the ligamentum nuchae

rhomboid minor insertion
base of the spine of the scapula

rhomboid minor nerve supply
dorsal scapular n. C5

rhomboid minor function
adduction and elevation of the scapula

serratus anterior origin
anterosuperior aspect of the upper 8 or 9 ribs

serratus anterior insertion
anterior surface of the vertebral border of the scapula

serratus anterior nerve supply
long thoracic n. C5-C7

serratus anterior function
scapula ABduction, upward rotation of the scapula (inferior fibers)

latissimus dorsi origin
spinous process of sacral, lumbar, and lower 6 thoracic vertebrae and the supraspinal ligament via the thoracolumbar fascia, iliac crest, and lower 3-4 ribs

latissimus dorsi insertion
floor of the intertubercular groove of the humerus

latissimus dorsi nerve supply
thoracodorsal n. C6-C8

latissimus dorsi function
extension, adduction, and medial rotation of the shoulder

teres major origin
posterior surface of the inferior angle of the scapula

teres major insertion
medial lip of the intertubercular groove of the humerus

teres major nerve supply
lower subscapular n. C5, C6

teres major function
adduction, extension, and medial rotation of the shoulder

posterior deltoid origin
inferior aspect of the spine of the scapula

posterior deltoid insertion
deltoid tuberosity of the humerus

posterior deltoid nerve supply
axillary n. C5, C6

posterior deltoid function
extension of the shoulder

middle deltoid origin
acromion process of the scapula

middle deltoid insertion
deltoid tuberosity of the humerus

middle deltoid nerve supply
axillary n. C5, C6

middle deltoid function
abduction of the shoulder

supraspinatus origin
supraspinatus fossa of the scapula

supraspinatus insertion
greater tubercle of the humerus

supraspinatus nerve supply
suprascapular n. C5-8, T1

supraspinatus function
ABduction and lateral rotation of the shoulder

pectoralis major origin
clacicular portion: anterior surface of the medial half of the clavical. sternocostal portion: anterior surface of the sternum, cartilage of ribs 1-7, aponeurosis of the external abdominal oblique.

pectoralis major insertion
lateral lip of the intertubercular groove of the humerus

pectoralis major nerve supply
medial and lateral pectoral n. C5-8, T1

pectoralis major function
ADDuction and medial rotation of the shoulder. Clavicular portion: flexion and horizontal ADDuction of the shoulder. Sternocostal portion: extension of the shoulder from a flexed position.

subscapularis origin
subscapular fossa of the scapula

subscapularis insertion
lesser tubercle of the humerus

subscapularis nerve supply
upper and lower subscapular n. C5, C6

subscapularis function
medial rotation of the shoulder

infraspinatus origin
intraspinatus fossa of the scapula

infraspinatus insertion
greater tubercle of the humerus

infraspinatus nerve supply
suprascapular n. C5, C6

infraspinatus function
lateral rotation of the shoulder

teres minor origin
superior 2/3 of the posterior surface of the axillary border of the scapula

teres minor insertion
greater tubercle of the humerus

teres minor nerve supply
axillary n. C5

teres minor function
lateral rotation of the shoulder
