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MS 100 > ch. 8: O/I of Muscles of Forearm > Flashcards

ch. 8: O/I of Muscles of Forearm Flashcards

1
Q

O/I of pronator teres (PT)

A

O: MED epicondyle of the humerus (above CFO), and coronoid process of the ulna (MED surface)
I: midlateral surface of shaft of radius

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2
Q

O/I of flexor carpi radialis (FCR)

A

O: MED epicondyle of humerus via CFT
I: base of 2nd and 3rd metacarpal (palmar surface)

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3
Q

O/I palmaris longus (PL)

A

O: MED epicondyle of humerus via the CFT
I: palmar carpal ligament and palmar aponeurosis

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4
Q

O/I flexor carpi ulnaris (FCU)

A

O: MED epicondyle via CFT, olecranon and POST border of ulna (SUP 2/3)
I: pisiform, hook of hamate and base of 5th metacarpal

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5
Q

which muscles of the forearm are superficial and of the ANT fascial compartment (4)

A

PT, FCR, PL, FCU

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6
Q

O/I of flexor digitorum superficialis (FDS)

A

O: MED epicondyle and coronoid process (MED side), oblique line of radius (ANT surface)
I: shaft of middle phalanges of the medial 4 digits (2-5)

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7
Q

O/I of flexor digitorum profundus (FDP)

A

O: PROX 2/3 of ANT surface of ulna and interosseous membrane
I: bases of DIST phalanges of 4 digits (2-5)

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8
Q

O/I of flexor pollicis longus (FPL)

A

O: ANT surface of radius (middle 1/2), interosseous membrane
I: base of DIST phalanx of thumb

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9
Q

O/I of pronator quadratus (PQ)

A

O: DIST 1/4 of ANT surface of ulna
I: DIST 1/4 of the ANT surface of radius (slightly DIST to origin)

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10
Q

deep muscles of the ANT fascial compartment (3)

A

FDP, FPL, PQ

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11
Q

O/I of brachioradialis (BR)

A

O: LAT supracondylar ridge of humerus (& LAT intermuscular septum)
I: base of styloid process of the radius

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12
Q

O/I of extensor carpi radialis longus (ECRL)

A

O: DIST 1/3 of the LAT supracondylar ridge
I: base of the 2nd metacarpal (dorsal surface)

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13
Q

O/I of extensor carpi radialis brevis (ECRB)

A

O: LAT epicondyle via CET
I: base of 3rd metacarpal (dorsal and radial surface)

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14
Q

O/I of extensor digitorum (ED)

A

O: LAT epicondyle via CET
I: middle and DIST phalanges of digits 2-5

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15
Q

O/I of extensor digiti minimi (EDM)

A

O: LAT epicondyle via CET
I: tendon of extensor digitorum on 5th digit (extensor expansion or hood)

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16
Q

O/I of extensor carpi ulnaris (ECU)

A

O: LAT epicondyle via common extensor tendon and POST border of ulna
I: base of 5th metacarpal (ulnar surface)

17
Q

superficial muscles of POST fascial compartment of forearm (6)

A

BR, ECRL, ECRB, ED, EDM, ECU

18
Q

O/I of supinator

A

O: LAT epicondyle, radial collateral and annular ligaments, and the supinator crest of the ulna
I: SUP 1/3 of the LAT and ANT surface of the radius

19
Q

Abductor pollicis longus (AbdPL)

A

O: POST surface of middle of radius and ulna and interosseous membrane
I: base of the 1st metacarpal (lateral/radial side)

20
Q

Extensor pollicis longus (EPL)

A

O: middle 1/3 of the POST surface of the ulna and the interosseous membrane
I: base of the DIST phalanx of the thumb

21
Q

extensor pollicis brevis (EPB)

A

O: POST surface of the middle of the radius and interosseous membrane (DIST to AbdPL)
I: base of PROX phalanx of thumb

22
Q

extensor indicis (EI)

A

O: DIST POST surface of ulna and interosseous membrane
I: tendon of extensor digitorum on the 2nd digit (extensor expansion or hood)

23
Q

deep muscles of the POST facial compartment (forearm) (5)

A

supinator, AbdPL, EPL, EPB, EI

24
Q

thenar intrinsic muscles of the hand (4)

A

abductor pollicis brevis, flexor pollicis brevis, opponens pollicis adductor pollicis

25
Q

abductor pollicis brevis

A

O: flexor retinaculum, scaphoid and tubercle of the trapezium
I: base of PROX phalanx of thumb (LAT/radial aspect)

26
Q

opponens pollicis

A

O: flexor retinaculum and trapezium
I: LAT shaft of first metacarpal (radial side)

27
Q

flexor pollicis brevis

A

O: flexor retinaculum and trapezium
I: base of PROX phalanx of thumb (LAT/radial aspect)

28
Q

adductor pollicis

A

O (Oblique head): capitate and bases of metacarpals 2 and 3
O (transverse head): 3rd metacarpal- ANT surface (palmar)
I: MED side of PROX phalanx of thumb

29
Q

intrinsic muscles of the hand (hypothenar group) (4)

A

palmaris brevis, abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi

30
Q

palmaris brevis

A

O: flexor retinaculum and palmar aponeurosis
I: skin on the ulnar border of palm of hand

31
Q

abductor digiti minimi

A

O: pisiform
I: base of PROX phalanx of 5th digit

32
Q

flexor digiti minimi brevis

A

O: flexor retinaculum and hook of hamate
I: base of PROX phalanx of 5th digit

33
Q

opponens digiti minimi

A

O: flexor retinaculum and hook of the hamate
I: MED border of shaft of 5th metacarpal

34
Q

lumbricales

A

O: tendons of flexor digitorum profundus (off LAT aspect of 2nd-5th tendons and off MED aspect of 3rd & 4th tendons also)
I: extensor expansions (hoods) of digits 2-5

35
Q

dorsal interosseii

A

O: adjacent sides of the shaft of the metacarpals (2 heads)
I: extensor expansions and bases of PROX phalanges of digits 2, 3, 4

36
Q

palmar interosseii

A

O: palmar MED surface of the 2nd metacarpal and palmar LAT surface of 4th and 5th metacarpal (1 head)
I: extensor expansions and bases of PROX phalanges of digits 2, 4, and 5

MS 100 (15 decks)

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