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Muscle
Pectoralis
major
Origin
clavicular head:
anterior medial half of
clavicle
sternocostal head:
anterior sternum + rib 16 cartilage; aponerosis
of external oblique
muscle
Anterior 3-5 ribs
Insertion
Lateral lip of
Intertubercular groove
Nerve
Medial & lateral
pectoral nerves
Action
Glenohumeral:
Adduction, Horizontal
adduction
medial rotation
Upper: flexion
lower: extension
coracoid process
Medial pectoral nerve
Junction of 1st rib with
costal cartilage
External lateral 1-8 ribs
Inferior middle third of
clavicle
Anterior medial border
of scapula
Nerve to subclavious
Trapezius
Skull nuchal line, c1-t12
vertebrae
Lateral clavicle, medial
acromion, all spine
Spinal root of accessory
nerve + C3 + C4
Latissimus
dorsi
Spinal process of t7-l5,
iliac crest.
(passing 4 lower ribs +
inferior angle of
scapula) Intertubercular
groove
Thoracodorsal nerve
levator
scapulae
C1-c4 transverse process Superior angle of
scapula
Rhomboids
Minor: nuchal ligament
+ SP C7+T1
Major: SP T2+T5
Scapula: Depression,
protraction
Stabilizing clavicle &
depress clavicle
Protects + protraction of
scapula.+ Upward
rotation + maintain
scapula apposed to
thoracic wall
Scapula:
Upper: elevation
Lower: depression
both: upward rotation
middle: retraction
Scapula: retraction,
depression
Glenohumeral:
extension, medial
rotation, adduction
Scapula: elevation,
retraction, downward
rotation
Scapula: retraction,
downward rotation,
stabilizing
Pectoralis
minor
Subclavious
Serratus
anterior
Long thoracic nerve
Dorsal scapular nerve +
C3+C4
Medial border of scapula Dorsal scapular nerve
Muscle
Supraspinatous
Infraspinatous
Teres minor
Subscapularis
Teres Major
Deltoid
Biceps
Brachialis
Origin
Supraspinatous fossa
Infraspinatous fossa
Infraspinatous fossa
Medial border of
subscapular fossa
Upper lateral border of
scapula
Lateral third of clavicle,
acromion, spine
Insertion
Greater tubercle (1)
Greater tubercle (2)
Greater tubercle (3)
Lower tubercle
1. long supraglenoid
tubercle through
capsule, Intertubercular
groove.
2. short coracoid
process
anterior distal half of
humerus shaft
Radial tuberocity of
radius + bicipital
aponeurosis
Musculocutaneous
nerve
Ulna’s coronoid
process + tuberocity of
ulna
Medial Middle third of
humerus
proximal ed of
ocleranon
Musculocutaneous
nerve
Elbow flexion
Musculocutaneous
nerve
Radial nerve
Glenohumeral flexion,
adduction
Elbow: extension
Coracobrachialis Coracoid process
triceps
1.
long infraglenoid
tubercle
2.
lateral postlateral shaft above
radial groove
3.
medial postlateral shaft under
radial groove
Medial lip of
Intertubercular groove
Deltoid tuberocity
Nerve
Suprascapular nerve
Suprascapular nerve
Axillary nerve
Upper & lower
subscapular nerve
Lower subscapular
nerve
Axillary nerve
Action
Abduction
Lateral rotation
Lateral rotation
Medial rotation
Adduction, medial
rotation, extension
Abduction of arm
Anterior: flexion +
medial rotation
Posterior: extension +
lateral rotation
Glenohumeral: flexion
Elbow: flexion,
supination
Muscle
Pronator teres
Flexor capi
radialis (FCR)
Flexor carpi
ulnaris
Origin
Common flexor tendon
(medial epicondyle &
coronoid process)
Common flexor tendon
(medial epicondyle &
coronoid process)
Common flexor tendon
(medial epicondyle &
coronoid process)
Palmaris
longus (15%20% absent)
Common flexor tendon
(medial epicondyle &
coronoid process)
Flexor
digitorum
superficialis
Common flexor tendon
(medial epicondyle &
coronoid process)
Insertion
Nerve
Anterior Forearm
Lateral shaft of radius
Median nerve
Pronation
Flexion of forarm
(helps)
Palmar flexion
Radial rotation
Metacarpal bone 2, 3
Median nerve
Hook of hamate,
piciform, metacarpal
bone 5
Ulnar nerve
Ulnar deviation
Flexion of forarm
(helps)
Palmar apuneurosis
Median nerve
Palmar flexion. Tension
of palmar apuneurosis
Intermediate layer
4 tendons to middle
Median nerve
phalanges of medial 4
digits
Flexor Pollicis
Longus (FPL)
Radial shaft
Deep layer
Distal Phalanx 1st digit
(thumb)
Flexor
Digitorum
Profundus
(FDP)
Pronator
Quadratus
Ant ulna and interossus
membrane
Bases distal phalanges 4
medial digits
Runs between distal 1/4 radius and ulna. Ulna is
considered to be the origin.
Brachioradialis Radial/lateral
Action
Flexion proximal interphalange joint (assists in
flexion
Metacarpalphalangeal
joint & Wrist J’s.)
Median N. Ant IO
branch
Flexes phalanges of 1st
digit (thumb)
Medial 2 tendons Ulnar
N. ; Lateral 2 tendons
Ant.interoseus branch
median n.
Anterior interoseus n.
Flexion DIP 4 medial
digits
Posterior forearm – lateral
Radius's styloid process Radial nerve
Forearm Pronation
Elbow: flexion
Extensor carpi
radialis longus
Extensor carpi
radialis brevis
Extensor
digitorum
Extensor digiti
minimi
Extensor carpi
ulnaris
Supinator
Abductor
pollicis longus
Extensor
pollicis brevis
Extensor
pollicis longus
Extensor
indicis
supracondylar ridge
Radial/lateral
supracondylar ridge
Common extensor
tendon (lateral
epicondyle)
Common extensor
tendon (lateral
epicondyle)
Common extensor
tendon (lateral
epicondyle)
Common extensor
tendon (lateral
epicondyle)
Lateral epicondyle &
ulna
Shaft of ulna and radius
Shaft of ulna
Shaft of ulna
Shaft of ulna
Base of metacarpal bone Radial nerve
2.
Posterior superficial layer
Base of metacarpal bone Deep radial nerve
3.
Wrist joint: radial
deviation, extension
Middle and distal
phalanges of 2-5.
Deep radial nerve
Extensor hood of 5 th
phalange
Deep radial nerve
Extension of: interphalange joints,
Metacarpalphalangeal
joint & Wrist J’s
Extension of 5 th
phalange
Base of metacarpal bone Deep radial nerve
5.
Posterior deep layer
Wraps around proximal Deep radial nerve
radius
Base of metacarpal 1
Deep radial nerve
Proximal phalange of
thumb (1)
Distal phalange of
thumb (1)
Extensor hood of
phalang 2.
Wrist joint: radial
deviation, extension
Wrist joint: ulnar
deviation, extension
Supination
Abduction of the thumb.
Deep radial nerve
Deep radial nerve
Deep radial nerve
Extension of the finger