Upper extremity Flashcards by Uyen Truong

Biceps Brachii m

Origin: Short head - coracoid process
Long head - supraglenoid tubercle

Insertion: Radial tuberosity and bicipital aponeurosis

Innervation: Musculocutaneous n

Arterial: Brachial A.

Action: Flex forearm and supination

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Brachialis m

Origin: Humerus

Insertion: Ulnar tuberosity/ coranoid process

Innervation: Musculocutaneous n

Arterial: Brachial A.

Action: Flex forearm

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Coracobrachialis m

Origin: Coracoid process

Insertion: Humerus

Innervation: Musculocutaneous n

Arterial: Brachial A.

Action: Flex forearm

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Arm flexor muscles

Biceps brachii
Brachialis
Coracobrachialis

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Triceps brachii .

Origin: Long head - infraglenoid tubercle
Lateral head - posterior humerus
Medial head - posterior humerus

Insertion: Olecranon

Innervation: Radial n.

Arterial: Deep Brachial a.

Action: Extend forearm

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Anconeus m.

Origin: Lateral epicondyle

Insertion: Olecranon and posterior proximal ulna

Innervation: Radial n.

Arterial: Deep brachial a.

Action: Extend forearm

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Arm extensor muscles

Triceps brachii

Anconeus

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Brachoradialis m.

Origin: Lateral supracondylar ridge

Insertion: Distal radius

Innervation: Radial n.

Arterial: Radial recurrent a.

Action: Flex forearm

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Supinator m.

Origin: Lateral epicondyle and ulnar crest

Insertion: Proximal radius

Innervation: Deep branch of radial n.

Arterial: Radial recurrent a. and posterior interosseous a.

Action: Supination

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Extensor carpi radialis longus m.

Origin: Larteral supracondylar ridge

Insertion: Base of 2nd metacarpal

Innervation: Radial n.

Arterial: Radial recurrent and Radial a.

Action: Extend and ABduct wrist

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Extensor carpi radialis brevis m

Origin: Lateral epicondyle

Insertion: Base of 3rd metacarpal

Innervation: Radial n.

Arterial: Radial recurrent and radial artery

Action: Extend and ABduct wrist

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Extensor carpi ulnaris m

Origin: Lateral epicondyle and posterior ulna

Insertion: Base of 5th metacarpal and pisiform

Innervation: Posterior interosseous n.

Arterial: Posterior interosseous a.

Action: Extend and ADduct wrist

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Extensor Digitorum m

Origin: Lateral epicondyle (common extensor tendon)

Insertion: extension expansions of 4 fingers

Innervation: Posterior interosseous n

Arterial: Posterior interosseous a

Action: Extend fingers at wrist

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Extensor digiti minimi m

Origin: Lateral epicondyle

Insertion: Extensor expansion of little finger

Innervation: Posterior interosseous n

Arterial: Posterior interosseus a

Action: Extend little finger

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Extensor indicis m

Origin: Posterior ulna and interosseous membrane

Insertion: Extensor expansion of index finger

Innervation: Posterior interosseous n

Arterial: Posterior interosseous a

Action: Extend index finger

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Abductor pollicis longus m

Origin: Posterior ulna, radius, and interosseous membrane

Insertion: Posterior base of thumb, metacarpal

Innervation: Posterior interosseous n

Arterial: posterior interosseous artery

Action: ABducts thumb

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Extensor Pollicis brevis m

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Origin: Posterior radius and interosseous membrane

Insertion: Base of thumb proximal phalanx

Innervation: Posterior interosseous n

Arterial: Posterior interosseous a

Action: Extend thumb

Extensor pollicis longus m

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Origin: Posterior ulna and interosseous membrane

Insertion: Base of distal phalanx

Innervation: Posterior interosseous n

Arterial: Posterior interosseous a

Action: Extend thumb

Flexor carpi radialis m

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Origin: medial epicondyle

Insertion: Proximal 2nd and 3rd metacarpal

Innervation: Median n

Arterial: Ulnar a

Action: Flex wrist and ABduction

Flexor carpi ulnaris m

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Origin: Medial epicondyle, olecranon and posterior ulna

Insertion: Proximal 5th metacarpal, pisiform, hook of hamate

Innervation: Ulnar n

Arterial: Ulnar a

Action: Flex wrist and ADduction

Palmaris longus m

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Origin: Medial epicondyle

Insertion: Palmar aponeurosis and distal flexor retinaculum

Innervation: Median n

Arterial: Ulnar a

Action: Flex wrist and tightening of palmar aponeurosis

Pronator Teres m

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Origin: Medial epicondyle and coronoid process of ulna

Insertion: Middle radius

Innervation: Median n

Arterial: Ulnar a and radial a

Action: Forearm pronation

Flexor digitorum superficialis m

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Origin: medial epicondyle, coronoid process of ulna and radius

Insertion: base of middle phalanges of 4 fingers

Innervation: Median n

Arterial: Ulnar a

Action: Flexion of wrist, metacarpal and phalanges

Flexor digitorum profundus m

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Origin: Ulnar and interosseous membrane

Insertion: Base of distal phalanges of 4 fingers

Innervation: Lateral - Anterior interosseous n (C8, T1)
Medial - Ulnar n (C7, 8, T1)

Arterial: Ulnar a

Action: Flexion of wrist and distal phalanges

Flexor pollicis longus m

Origin: Radius and interosseous membrane Insertion: Base of thumb on distal phalanx Innervation: Anterior interosseous n (C8, T1) Arterial: Anterior interosseous a Action: Flex thumb

Pronator quadratus m

Origin: Distal anterior ulna Insertion: Distal anterior radius Innervation: Anterior interosseous n (C8, T1) Arterial: Anterior interosseous a Action: Pronate forearm

Common origin for many Flexors

Medial epicondyle Exceptions: Flexor digitorum profundus m, Flexor pollicis longus m, and Pronator quadratus m

Common origin for many Extensors

Lateral epicondyle Exceptions: Brachioradialis m, Extensor carpis radialis longus m, Extensor indices m, Abductor pollicis longus m, Extensor pollicis longus and brevis m

ABductor pollicis brevis m

Origin: Trapezium and transverse carpal ligament Insertion: Thumb proximal phalanx Innervation: Recurrent branch of median n (C8, T1) Arterial: Palmar branch of radial a Action: Thumb ABduction

Opponens pollicis m

Origin: Trapezium, and transverse carpal ligament Insertion: Thumb at metacarpal Innervation: Reccurent branch of median n (C8, T1) Arterial: Palmar branch of radial a Action: Thumb opposition

Flexor pollicis brevis m

Origin: Superficial head - Trapezium and Flexor retinaculum Deep head - Trapezoid and capitate Insertion: Base to thumb, proximal phalanx Innervation: Superficial head - recurrent branch of median n. (C8, T1) Deep head - Ulnar n (C8, T1) Arterial: Palmar branch of radial a Action: Flex thumb

ABductor digiti minimi m

Origin: Pisiform Insertion: Base of little finger Innervation: Deep branch of ulnar n (C8, T1) Arterial: Ulnar a Action: ABduct pinky

Palmaris brevis m

Origin: Palmar aponeurosis Insertion: Medial palmar skin Innervation: Ulnar n Arterial: Ulnar a Action: Protect ulnar a and n

Thenar muscles

ABductor pollicis brevis m Flexor pollicis brevis m Opponens pollicis m

Opponens digiti minimi m

Origin: Hook of hamate and flexor retinaculum Insertion: Metacarpal of little finger Innervation: Deep branch of ulnar n (C8, T1) Arterial: Ulnar a Action: Rotation of little finger

Flexor digiti minimi m

Origin: Hook of hamate and flexor retinaculum Insertion: Base of little finger Innervation: Deep branch of ulnar n (C8, T1) Arterial: Ulnar a Action: Flex pinky

Dorsal Interosseous m

Origin: Two heads from adjacent metacarpals Insertion: Base of proximal phalanx and extension expansions for index, middle, and ring finger Innervation: Deep branch of ulnar n (C8, T1) Arterial: Metacarpal a Action: ABduct fingers

Palmar Interosseous m

Origin: 2nd, 4th, and 5th metacarpals Insertion: Base of proximal phalanx and extension expansion for index, ring and little finger Innervation: Deep branch of ulnar n (C8, T1) Arterial: Metacarpal a Action: ADduct fingers

ADductor pollicis m

Origin: Oblique head - capitate and base of 2nd and 3rd metacarpal Transverse head - proximal two thirds of 3rd metacarpal Insertion: thumb proximal phalanx Innervation: Deep branch of ulnar n (C8, T1) Arterial: Deep palmar arch Action: ADduct thumb

Lumbricals m

Origin: Tendons of flexor digitorum profundus Insertion: Lateral aspects of fingers extensor expansions Innervation: Lateral 2 - median n Median 2 - ulnar n Arterial: Superficial palmar arch Action: Finger flexion at MP and extension IP

Upper extremity Flashcards

(40 cards)