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Muscles of the Upper Extremity
Muscles of the Upper Extremity
124
Anatomy
Undergraduate 3
10/11/2008

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Term
Trapezius origin
Definition
ligamentum nuchae, spinous processes T1-T12
Term
Trapezius insertion
Definition
scapular spine, acromion, lateral 1/3 of clavicle
Term
Trapezius action
Definition
scapula retraction, depression
Term
Trapezius innervation
Definition
cranial nerve XI, spinal accesory n.
Term
Levator scapulae origin
Definition
transverse processes of C1-C4
Term
Levator scapulae insertion
Definition
medial scapular border
Term
Levator scapulae action
Definition
scapula elevation
Term
Levator scapulae innervation
Definition
`dorsal scapular n.
Term
Rhomboids origin
Definition
(min) interspinous processes C7-T1
(maj) interspinous processes T2-T5
Term
Rhomboids insertion
Definition
medial scapular border
Term
Rhobmoids action
Definition
retraction of scapula
Term
Rhomboids innervation
Definition
dorsal scapular n.
Term
Serratus anterior origin
Definition
lateral part of ribs 1-8
Term
Serratus anterior insertion
Definition
medial scapular border
Term
Serratus anterior action
Definition
protraction of scapula
Term
Serratus anterior innervation
Definition
long thoracic n.
Term
Pectoralis minor origin
Definition
anterior part of ribs 1-5
Term
Pectoralis minor insertion
Definition
coracoid process
Term
Pectoralis minor action
Definition
weak protraction
Term
Pectoralis minor innervation
Definition
medial pectoral n.
Term
Pectoralis major origin
Definition
medial 2/3 of clavicle, entire sternum
Term
Pectoralis major insertion
Definition
greater humeral tubercle
Term
Pectoralis major action
Definition
shoulder flexion, internal rotation, adduction
Term
Pectoralis major innervation
Definition
medial and lateral pectoral nn.
Term
Latissimus dorsi origin
Definition
spinous process T6-T12
Term
Latissimus dorsi insertion
Definition
floor of bicepital groove
Term
Latissimus dorsi action
Definition
internal rotation, adduction, extension
Term
Latissimus dorsi innervation
Definition
thoracodorsal n
Term
Deltoid origin
Definition
scapular spine, acromion, lateral 1/3 of clavicle
Term
Deltoid insertion
Definition
deltoid tuberosity
Term
Deltoid action
Definition
flexion and extension, abduction, internal rotation, external rotation
Term
Deltoid innervation
Definition
axillary n
Term
Subscapularis origin
Definition
subscapular fossa
Term
Subscapularis insertion
Definition
lesser humeral tubercle
Term
Subscapularis action
Definition
internal rotation of humerus
Term
Subscapularis innervation
Definition
upper and lower subscapular n
Term
Supraspinatus origin
Definition
supraspinious fossa
Term
Supraspinatus insertion
Definition
greater humeral tubercle
Term
Supraspinatus action
Definition
weak shoulder abduction
Term
Supraspinatus innervation
Definition
suprascapular n
Term
Infraspinatus origin
Definition
infraspinous fossa
Term
Infraspinous insertion
Definition
greater humeral tubercle
Term
Infraspinatus action
Definition
external rotation
Term
Infraspinatus innervation
Definition
suprascapular n
Term
Teres minor origin
Definition
lateral scapular border
Term
Teres minor insertion
Definition
greater humeral tubercle
Term
Teres minor action
Definition
external rotation
Term
Teres minor innervation
Definition
axillary n
Term
Teres major origin
Definition
lower part of scapula
Term
Teres major insertion
Definition
lesser humeral tubercle
Term
Teres major action
Definition
internal rotation
Term
Teres major innervation
Definition
lower subscapular n
Term
Coracobrachialis origin
Definition
coracoid process
Term
Coracobrachialis insertion
Definition
medial humeral border
Term
Coracobrachialis action
Definition
shoulder flexion and adduction
Term
Coracobrachialis innervation
Definition
musculocutaneous n
Term
Biceps brachii origin
Definition
(long) = supraglenoid tubercle
(short) = coracoid process
Term
Biceps brachii insertion
Definition
radial tuberosity
Term
Biceps brachii action
Definition
shoulder and elbow flexion, supination
Term
Biceps brachii innervation
Definition
musculocutaneous n
Term
Brachialis origin
Definition
lower 1/2 of humerus
Term
Brachialis insertion
Definition
ulnar tuberosity
Term
Brachialis action
Definition
weak elbow extension
Term
Brachialis innervation
Definition
musculocutaneous n.
Term
Triceps brachii origin
Definition
(long) = infraglenoid tubercle
(med and lat) = posterior humeral surface
Term
Triceps brachii insertion
Definition
olecranon process
Term
Triceps brachii action
Definition
(long) = shoulder extension
(all) = elbow extension
Term
Triceps brachii innervation
Definition
radial n
Term
Anconeus origin
Definition
lateral humeral epicondyle
Term
Anconeus insertion
Definition
olecranon process
Term
Anconeus action
Definition
weak elbow extension
Term
Anconeus innervation
Definition
radial n
Term
Pronator teres origin
Definition
medial humeral epicondyle
Term
Pronator teres action
Definition
pronation
Term
Flexor carpi radialis origin
Definition
medial humeral epicondyle
Term
Pronator teres innervation
Definition
median n.
Term
Flexor carpi radialis action
Definition
wrist flexion, radial adduction
Term
Flexor digitorum superficialis action
Definition
wrist flexion, MCP and proximal IP flexion
Term
Flexor pollicis longus action
Definition
all joint flexion in thumb
Term
Flexor pollicis longus innervation
Definition
median n
Term
Flexor digitorum longus action
Definition
flexes wrist and MCP joint
Term
Flexor digitorum profundus innervation
Definition
(radial) = median n
(ulnar) = ulnar n
Term
Pronator quadratus action
Definition
pronation
Term
Pronator quadratus innervation
Definition
median n
Term
Brachioradialis action
Definition
elbow flexion
Term
Brachioradialis innervation
Definition
radial n.
Term
Extensor carpi radialis longus and brevis action
Definition
wrist extension and abduction
Term
Extensor carpi radialis longus and brevis innervation
Definition
radial n
Term
Extensor digitorum action
Definition
wrist, MCP, IP extension
Term
Extensor innervation
Definition
radial n
Term
Extensor digiti minimi action
Definition
5th digit extension
Term
Extensor digiti minimi innervation
Definition
radial n
Term
Extensor carpi ulnaris action
Definition
wrist extension
Term
Extension carpi ulnaris innervatino
Definition
radial n
Term
Abductor pollicis longus action
Definition
CMC joint extension in thumb
Term
Extensor pollicis longus innervation
Definition
median n
Term
Extensor pollicis brevis action
Definition
CMC, MCP extension
Term
Extensor pollicis brevis innervation
Definition
median n
Term
Extensor pollicis longus action
Definition
CMC, MCP, IP joint extension
Term
Extensor pollicis longus innervation
Definition
median n
Term
Extensor indices action
Definition
extends 2nd digit at all joints
Term
Extensor indices innervation
Definition
median n
Term
Supinator action
Definition
Supination
Term
Supinator innervation
Definition
median n
Term
Abductor pollicis brevis action
Definition
thumb abduction
Term
Abductor pollicis brevis innervation
Definition
median n
Term
Flexor pollicis brevis action
Definition
CMC joint flexion in thumb
Term
Flexor pollicis brevis innervation
Definition
median n
Term
Opponens pollicis action
Definition
flexion and abduction of thumb
Term
Opponens pollicis innervation
Definition
median n
Term
Adductor pollicis action
Definition
thumb adduction
Term
Adductor pollicis innervation
Definition
median and ulnar n
Term
Abductor digiti minimi action
Definition
5th digit abduction
Term
Abductor digiti minimi innervation
Definition
ulnar n
Term
Flexor digiti minimi brevis action
Definition
5th digit flexion
Term
Flexor digit minimi brevis innervation
Definition
ulnar n
Term
Opponens digiti minimi action
Definition
5th digit flexion
Term
Opponens digiti minimi innervation
Definition
ulnar n
Term
Lumbricales action
Definition
MCP joint flexion
Term
Lumbricales innervation
Definition
(1-2) = ulnar n
(3-4) = median n
Term
Dorsal interossei action
Definition
2, 3, 4th digit abduction
Term
Dorsal interossei innervation
Definition
ulnar n
Term
Palmar interossei action
Definition
2, 4, 5th digit adduction
Term
Palmar interossei innervation
Definition
ulnar n
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