OIA UE Part 1 Flashcards
trapezius origin
- external occipital protuberance
- ligamentum nuchae
- spinous processes of C1-T12
trapezius insertion
- posterior lateral clavicle
- medial surface of acromion process
- scapular spine
trapezius action
upper part: elevation, adduction and upward rotation of shoulder girdle
middle part: scapular adduction
lower part: depression, adduction and upward rotation of shoulder girdle
trapezius innervation
spinal accessory CN XI
latissimus dorsi origin
- spinous processes of T7-S5
2. posterior iliac crest
latissimus dorsi insertion
intertubercular groove
latissimus dorsi action
- shoulder adduction
- shoulder extension (from flexed position)
- shoulder internal rotation
latissimus dorsi innervation
thoracodorsal
levator scapulae origin
transverse processes of C1-C4
levator scapulae insertion
- superior angle of scapulae
2. medial border of scapula (superior to scapular spine)
levator scapulae action
- scapular elevation
- lateral flexion of neck
- downward rotation of scapula
levator scapulae innervation
dorsal scapular
rhomboid minor origin
spinous processes of C7 & T1
rhomboid minor insertion
medial border of scapula (at level of scapular spine)
rhomboid minor action
- scapular adduction
2. downward rotation of scapula
rhomboid minor innervation
dorsal scapular
rhomboid major origin
spinous processes of T2-T5
rhomboid major insertion
medial border of scapula (inferior to scapular spine)
rhomboid major action
- scapular adduction
2. downward rotation of scapula
rhomboid major innervation
dorsal scapular
serratus anterior origin
anterolateral surface of upper 8 or 9 ribs
serratus anterior insertion
medial border of scapula, costal aspect
serratus anterior action
- scapular abduction
- upward rotation of scapula
- functionally controls winging
serratus anterior innervation
long thoracic
subclavius origin
first rib
subclavius insertion
inferior surface of clavicle
subclavius action
depresses and stabilizes clavicle
subclavius innervation
nerve to subclavius
pectoralis major origin
- medial clavicle
- sternum
- ribs 2-6
pectoralis major insertion
intertubercular groove (lateral lip)
pectoralis major action
- shoulder adduction
- shoulder internal rotation
- shoulder horizontal adduction
- shoulder flexion (from extended position)
pectoralis major innervation
medial and lateral pectoral
pectoralis minor origin
anterior surface of ribs 3-5 near cartilage
pectoralis minor insertion
coracoid process
pectoralis minor action
- scapular depression
- anterior tilt of scapula
- scapular abduction
pectoralis minor innervation
medial pectoral
deltoid origin
anterior: lateral clavicle
middle: acromion process
posterior: scapular spine
deltoid insertion
deltoid tuberosity
deltoid action
all parts: shoulder abduction
anterior part: flexion, internal rotation, and horizontal adduction of the shoulder
posterior part: extension, external rotation and horizontal abduction of shoulder
deltoid innervation
axillary
supraspinatus origin
supraspinous fossa
supraspinatus insertion
- superior facet of greater tubercle
2. shoulder joint capsule
supraspinatus action
shoulder abduction
supraspinatus innervation
suprascapular
infraspinatus origin
infraspinous fossa
infraspinatus insertion
- medial facet of greater tubercle
2. shoulder joint capsule
infraspinatus action
shoulder external rotation
infraspinatus innervation
suprascapular
teres minor origin
lateral border of scapula, middle third
teres minor insertion
- inferior facet of greater tubercle
2. shoulder joint capsule
teres minor action
shoulder external rotation
teres minor innervation
axillary
subscapularis origin
subscapular fossa
subscapularis insertion
- lesser tubercle
2. shoulder joint capsule
subscapularis action
shoulder internal rotation
subscapularis innervation
upper and lower subscapular
teres major origin
lateral border of scapula inferior part
teres major insertion
intertubercular groove (medial lip)
teres major action
- shoulder internal rotation
- shoulder extension (from flexed position)
- shoulder adduction
teres major innervation
lower subscapular
coracobrachialis origin
coracoid process
coracobrachialis insertion
mid-shaft of humerus, medial surface
coracobrachialis action
- shoulder flexion
2. shoulder adduction
coracobrachialis innervation
musculocutaneous
biceps brachii origin
long head: supraglenoid tubercle
short head: coracoid process
biceps brachii insertion
- radial tuberosity
2. bicipital aponeurosis (lacertus fibrosus)
biceps brachii action
- elbow flexion
- supination
- shoulder flexion
biceps brachii innervation
musculocutaneous
brachialis origin
anterior humerus distal half
brachialis insertion
ulnar tuberosity
brachialis action
elbow flexion
brachialis innervation
musculocutaneous and radial
triceps brachii origin
long head: infraglenoid tubercle
lateral head: proximal half of posterior humerus
medial head: distal posterior humerus
triceps brachii insertion
olecranon process
triceps brachii action
elbow extension
long head: shoulder adduction and shoulder extension (from flexed)
triceps brachii innervation
radial
anconeus origin
lateral epicondyle of humerus posterior surface
anconeus insertion
olecranon process and shaft of ulna
anconeus action
- elbow extension
2. tension of elbow joint capsule
anconeus innervation
radial
pronator teres origin
humeral head: medial epicondyle via common flexor tendon
ulnar head: coronoid process
pronator teres insertion
middle shaft of radius lateral surface
pronator teres action
pronation
elbow flexion
pronator teres innervation
median
flexor carpi radialis origin
medial epicondyle of humerus via common flexor tendon
flexor carpi radialis insertion
bases of metacarpals 2-3, palmar side
flexor carpi radialis action
wrist flexion
radial deviation
elbow flexion
flexor carpi radialis innervation
median
palmaris longus origin
medial epicondyle of humerus via common flexor tendon
palmaris longus insertion
palmar aponeurosis
flexor retinaculum
palmaris longus action
wrist flexion
elbow flexion
palmaris longus innervation
median
flexor carpi ulnaris origin
humeral head: medial epicondyle via common flexor tendon
ulnar head: proximal posterior ulna
flexor carpi ulnaris insertion
splits to both sides of the base of each middle phalanx of digits 2-5
flexor carpi ulnaris action
wrist flexion
ulnar deviation
elbow flexion
flexor carpi ulnaris innervation
ulnar
flexor digitorum superficialis origin
humeral-ulnar head: medial epicondyle via common flexor tendon and coronoid process of ulna
radial head: oblique line
flexor digitorum superficialis insertion
splits to both sides of the base of each middle phalanx of digits 2-5
flexor digitorum superficialis action
finger flexion
wrist flexion
elbow flexion
flexor digitorum superficialis innervation
median
flexor digitorum profundus origin
anterior medial surface of proximal half of ulna
flexor digitorum profundus insertion
distal phalanges of digits 2-5
flexor digitorum profundus action
finger flexion
wrist flexion
flexor digitorum profundus innervation
ulnar (medial portion) & median (lateral portion)
flexor pollicis longus origin
middle of anterior radius and interosseous membrane
flexor pollicis longus insertion
base of the distal phalanx of pollex palmar surface
flexor pollicis longus action
flexion of pollex
MCP, CMC, and wrist felxion
flexor pollicis longus innervation
median
pronator quadratus origin
distal 1/4 anteromedial surface of ulna
pronator quadratus insertion
distal 1/4 anterolateral surface of radius
pronator quadratus action
pronation
pronator quadratus innervation
median
brachioradialis origin
lateral supracondylar ridge of humerus
brachioradialis insertion
styloid process of radius
brachioradialis actions
elbow flexion
supination when forearm is pronated
pronation when forearm is supinated
brachioradialis innervation
radial
supinator origin
lateral epicondyle of humerus
supinator crest
supinator insertion
proximal anterolateral surface of radius
supinator action
supination
supinator innervation
radial
extensor carpi radialis longus origin
lateral supracondylar ridge of humerus
extensor carpi radialis longus insertion
base of 2nd metacarpal, dorsal surface
extensor carpi radialis longus action
wrist extension
radial deviation
elbow flexion
extensor carpi radialis longus innervation
radial
extensor carpi radialis brevis action
lateral epicondyle of humerus via common extensor tendon
extensor carpi radialis brevis insertion
base of 3rd metacarpal, dorsal surface
extensor carpi radialis brevis action
wrist extension
radial deviation
elbow flexion
extensor carpi radialis brevis innervation
radial
abductor pollicis longus origin
posterior surface of ulna and radius
interosseous membrane
abductor pollicis longus insertion
base of 1st metacarpal lateral surface
abductor pollicis longus action
abduction of 1st metacarpal
radial deviation
extension of pollex
abductor pollicis longus innervation
radial