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MS 1 > Origins of Muscles of the Forearm > Flashcards

Origins of Muscles of the Forearm Flashcards

1
Q

What are the origins of pronator teres?

A

Humeral head: medial epicondyle of the humerus (above CFO)
Ulnar Head: coronoid process of the ulna (med surface).

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2
Q

What is the origin of flexor carpi radialis (FCR)?

A

Medial epicondyle of humerus via the common flexor tendon

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3
Q

What is the origin of palmaris longus (PL)?

A

Medial epicondyle of humerus via common flexor tendon

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4
Q

What are the origins of flexor carpi ulnaris (FCU)?

A

Humeral head: medial epicondyle via the common flexor tendon.

Ulnar head: olecranon and posterior border of ulna (superior 2/3)

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5
Q

What are the origins of flexor digitorum superficialis (FDS)?

A

Humeroulnar head: Medial epicondyle of humerus and coronoid process of ulna (medial side)

Radial head: Oblique line of radius (anterior surface)

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6
Q

What is the origin of flexor digitorum profundus (FDP)?

A

Proximal 2/3 of anterior surface of ulna and interosseus membrane

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7
Q

What is the origin of flexor pollicis longus (FPL)

A

Anterior surface of radius (middle 1/2), interosseus membrane.

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8
Q

What is the origin of pronator quadratus? (PQ)

A

Distal 1/4 of the anterior surface of ulna

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9
Q

What is the origin of brachioradialis? (BR)

A

Lateral supracondylar ridge of the humerus (and lateral intermuscular septum)

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10
Q

What is the origin of extensor carpi radialis longus? (ECRL)

A

Distal 1/3 of the lateral supracondylar ridge of the humerus

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11
Q

What is the origin of extensor carpi radialis brevis? (ECRB)

A

Lateral epicondyle of humerus via common extensor tendon

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12
Q

What is the origin of extensor digitorum? (ED)

A

Lateral epicondyle of humerus via common extensor tendon

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13
Q

What is the origin of extensor digiti minimi? (EDM)

A

Lateral epicondyle of humerus via common extensor tendon.

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14
Q

What is the origin of extensor carpi ulnaris? (ECU)

A

Lateral epicondyle of humerus via common extensor tendon and posterior border of the ulna

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15
Q

What is the origin of Supinator?

A

Lateral epicondyle of humerus, radial collateral and annular ligaments, and the supinator crest of the ulna

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16
Q

What is the origin of abductor pollicis longus? (APL)

A

Posterior surface of middle of radius and ulna and interosseus membrane

17
Q

What is the origin of extensor pollicis longus? (EPL)

A

Middle 1/3 of the posterior surface of the ulna and the interosseus membrane (distal to AbdPL)

18
Q

What is the origin of extensor pollicis brevis? (EPB)

A

Posterior surface of the middle of the radius and interosseus membrane (distal to AbdPL)

19
Q

What is the origin of extensor indicis? (EI)

A

Distal posterior surface of the ulna and interosseus membrane

20
Q

What is the origin of abductor pollicis brevis?

A

flexor retinaculum, scaphoid, and tubercle of the trapezium.

21
Q

What is the origin of opponens pollicis?

A

flexor retinaculum and trapezium

22
Q

What is the origin of flexor pollicis brevis?

A

flexor retinaculum and trapezium

23
Q

What are the origins of adductor pollicis?

A

oblique head: capitate and bases of metacarpals 2 and 3.

transverse head: 3rd metacarpal - anterior surface (palmar)

24
Q

What is the origin of palmaris brevis?

A

flexor retinaculum and palmar aponeurosis

25
Q

What is the origin of abductor digiti minimi?

A

pisiform

26
Q

What is the origin of flexor digiti minimi brevis?

A

flexor retinaculum and hook of the hamate

27
Q

What is the origin of opponens digiti minimi?

A

flexor retinaculum and hook of the hamate

28
Q

What is the origin of lumbricales?

A

tendons of flexor digitorum profundus (off lateral aspect of 2nd-5th tendons and off medial aspect of 3rd and 4th tendons also.

29
Q

What is the origin of dorsal interosseii?

A

adjacent sides of the shaft of the metacarpals (2 heads)

30
Q

What is the origin of palmar interosseii?

A

palmar medial surface of 2nd metacarpal and palmar lateral surface of 4th and 5th metacarpal (1 head)

MS 1 (9 decks)

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