anatomy shoulder/upper arm muscles- dpt

rhomboid (major and minor)

p- spinous processes C7, T1-T5, supraspinous ligament, inferior aspect ligamentum nuchae

d- med. border scapula: from inferior angle to root of spine of scapula

n- dorsal scapular n

s- C4, C5

a- scap retraction, elevation, inward rot.

upper trapezius

p- lig. nuchae, occiput, spinous process C7

d- lateral 1/3 post. aspect of clavicle

n- CN XI (spinal accessory), C3-4

a- scap elevation, out. rot, retraction

middle trapezius

p- S-process T1-5, supraspinous lig.

d- medial margin of acromion process, sup. aspect of spine of scap. to root

n- CN XI (spinal accesory), C3-4

a- scap retraction, out. rot

lower trap

p- S-processT6-12, supraspinous lig

d- inf. aspect of med. 2/3 of spine of scapula

n- CN XI (spinal accessory), C3-4

a- scap depression, out. rot, retraction

subclavius

p- sup. aspect of 1st rib

d- inf. and lat. aspect of clavicle

n- nerve to subclavius

s- C5-6

a- depress shoudler girdle, accessory muscle of respiration

levator scapulae

p- T-process C1-4

d- sup. angle of scapula, medial border of scapula to root of spine of scapula

n- dorsal scapular n, C3-4 (via cervical plexus)

s- C3-5

a- scap. elevation, retraction, inward rot.

serratus anterior

p- anterolateral aspect of ribs 1-8 (9)

d- med. border of scapula

n- long thoracic n

s- C5, 6, 7

a- out. rot, protraction of scapula

pectoralis minor

p- anteromedial aspect ribs 3,4,5

d- coracoid process

n- medial pectoral n

s- C8, T1

a- depression, down. rot, protraction of scapula

supraspinatus

p- medial 2/3 of supraspinous fossa

d- sup. facet of GT

n- suprascapular n

s- C5,6

a- shoulder abd, rotator cuff functions

infraspinatus

p- med. 2/3 of infraspinous fossa

d- middle facet of GT

n- suprascapular n

s- C5,6

a- shoulder ER; rotator cuff function

teres minor

p- prox.2/3 axillary border of scapula

d- inferior facet of GT

n- axillary n

s- C5,6

a- shoulder ER, rotator cuff function

subscapularis

p- med. 2/3 subscap fossa

d- lesser tubercle

n- upper/lower subscap

s- C5,6,7

a- IR of shoulder, rotator cuff function

anterior deltoid

p- lat. 1/3 of ant. sup. clavicle

d- deltoid tuberosity

n- axillary n

s- C5,6

a- shoulder flex, horizontal add.

middle deltoid

p- lat. margin of acromion

d- deltoid tuberosity

n- axillary n

s- C5,6

a- shoulder abd

posterior deltoid

p- lat. 2/3 posterior and inferior spine of scap

d- deltoid tuberosity

n- axillary n

s- C5,6

a- shoulder ext, abd, horiz. abd

teres major

p- distal 1/3 axillary border of scapula and inferior angle

d- crest of lesser tubercle

n- lower subscapular n

s- C5,6

a- shoulder IR, extension

coracobrachialis

p- coracoid process

d- anteromed. aspect of humerus at mid-shaft

n- musculocutaneous n

s- C5,6,7

a- shoulder flex, add.

latissimus dorsi

p- S-processes T7-12, lumbar vert, sacrum; lower 4 ribs; thoracolumbar fascia

d- intertubercular groove; crest of lesser tubercle, inferior scapular fascia

n- thoracodorsal n

s- C6,7,8

a- ext, IR of shoulder, depression of girdle

pectoralis major (sternal)

p- lat. 1/3 ant. sternum and costal cartilages

d- crest of greater tubercle

n- medial pectoral n

s- C7,8; T1

a- shoulder adduction, IR

pectoralis major (clavicular)

p- med. ½ ant. aspect of clavicle

d- crest of greater tubercle

n- lateral pectoral n

s- C5,6

a- shoulder add, IR, flexion, horiz. add

biceps brachii

p- short: coracoid process; long: supraglenoid tubercle, labrum

d- tuberosity of radius, bicipital aponeurosis

n- musculocutaneous n

s- C5,6,7

a- G-H flexion, elbow flexion, forearm supination

brachialis brachii

p- distal ½ anterior aspect of humerus

d- tuberosity of ulna and cornoid process

n- musculocutaneous n

s- C5,6

a- elbow flexion

triceps brachii

p- long head: infraglenoid tubercle; lateral head: prox 2/3 posterolateral humerus; medial head: distal 1/3 posteromedial humerus

d- post. aspect of olecranon

n- radial n

s- C6,7,8

a- elbow extension, shoulder extension/ add