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spine of scapula
F

supraspinous fossa
G

infraspinous fossa
H

subscapular fossa
E

acromion
A

coracoid process
C

humeral head
A

surgical neck
F

anatomic neck
B

lesser tubercle
C

greater tubercle
D

intertubercular sulcus
E

deltoid tuberosity
G

medial epicondyle
H

lateral epicondyle
N

trochlea of humerus
J

capitulum
K

coronoid fossa
L

radial fossa
M

olecranon fossa
I

radial head
A

neck of radius
B

radial tuberosity
F

trochlear notch
C

radial notch of ulna
D

olecranon
E

dorsal tubercle of radius
G

styloid process of radius
H

styloid process of ulna
I

head of ulna in ulnar notch of radius
J

radius
K (bone)

ulna
L (bone)

C5
A

C6
B

C7
C

C8
D

T1
E

trunks
blue general name (F,G,H)

superior trunk
F

middle trunk
G

inferior trunk
H

lateral cord
green

posterior cord
orange

medial cord
bright pink

suprascapular nerve
nerve coming off of F (tan to scapula)

axillary nerve
arrow pointing to

upper suprascapular nerve
A

lower suprascapular nerve
B

pectoralis major
royal blue

lateral and medial pectoral nerves
innervation of pectoralis major
ADDuct and medially rotate humerus
main movement of pectoralis major
extends humerus from flexed position
action of sternocostal head of pectoralis major
flexes humerus
action of clavicular head of pectoralis major
pectoralis minor
teal/light blue

medial pectoral nerves
innervation of pectoralis minor
stabilizes scapula
stretching upper limb forward to touch an object out of reach
function of pectoralis minor
lateral pectoral nerve
teal arrow

medial pectoral nerve
royal blue arrow

serratus anterior
bright pink

long thoracic nerve
innervation of serratus anterior
protract, rotate, and anchor scapula
action of serratus anterior
subclavius
yellow

nerve to subcalvius
innervation of subclavius
anchors and depresses clavicle
protection underlying vasculature
action of subclavius
trapezius
dark blue

accessory nerve (CNXI)
innervation of trapezius
elevate scapula
descending trapezius function
retract scapula (pull posteriorly)
middle part trapezius function
depress scapula, lower shoulder
ascending part of scapula
latissmus dorsi
hot green

thoracodorsal nerve
latissmimus dorsi innervation
extend, adduct, and medially rotate humerus
action of latissimus dorsi
thoracodorsal nerve

thoracodorsal artery

thoracodorsal vein

levator scapulae
yellow (deeper under trap)

dorsal scapular nerve
Innervates levator scapulae
dorsal scapular nerve

elevate scapula
action of levator scapulae
rhomboid major (orange) and minor (blue)
orange and blue

dorsal scapular nerve
innervation of rhomboid major/minor
retract and rotate scapula
action of the rhomboid muscles
deltoid
teal/light blue

axillary nerve
innervation of deltoid nerve
ABduct arm (after 15 degrees)
resist inferior displacement of humerus
deltoid action
teres major
red

subscapular nerve
innervation of teres major
ADDuct and medially rotate arm
action of teres major
supraspinatus
green

infraspinatus
yellow

suprascapular nerve
innervation of supraspinatus and infraspinatus
first 15 degrees of ABduction
action of supraspinatus
first 15 degrees -> supraspinatus
after 15 degrees -> deltoid
ABduction of humerus (1st 15 degrees and on)
lateral rotation of humerus
-stabilize glenohumeral joint
action of infraspinatus
teres minor
royal blue

axillary nerve
innervation of teres minor
rotate arm laterally
- weakly helps ADDuction
action teres minor
subscapularis
pink

subscapular nerve
innervation subscapularis
medial rotation of arm
ADDucts arm
action of subscapularis