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Functional Anatomy > Posterior Compartment of Forearm > Flashcards

Posterior Compartment of Forearm Flashcards

1
Q

extensor carpi radialis longus (ECRL) prox attach

A

lateral supracondylar ridge

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2
Q

extensor carpi radialis longus (ECRL) distal attach

A

dorsal aspect of base of 2nd metacarpal

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3
Q

extensor carpi radialis longus (ECRL) axn

A

wrist extension, radial deviation (abd)

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4
Q

extensor carpi radialis longus (ECRL) innervation

A

radial n. (C6, C7)

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5
Q

extensor carpi radialis brevis (ECRB) prox attach

A

lateral epicondyle

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6
Q

extensor carpi radialis brevis (ECRB) distal attach

A

base of dorsal aspect of 3rd metacarpal

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7
Q

extensor carpi radialis brevis (ECRB) axn

A

wrist extension, radial deviation (abd)

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8
Q

extensor carpi radialis brevis (ECRB) innervation

A

deep branch of radial n (C7*, C8)

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9
Q

extensor carpi ulnaris (ECU) prox attach

A

lateral epicondyle of humerus and posterior border of ulna

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10
Q

extensor carpi ulnaris (ECU) distal attach

A

base of dorsal aspect on 5th metacarpal bone

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11
Q

extensor carpi ulnaris (ECU) axn

A

wrist ext, ulnar deviation

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12
Q

extensor carpi ulnaris (ECU) innervation

A

posterior interosseous n. (PIN) (branch of radial) (C7*, C8)

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13
Q

extensor digitorum (ED) prox attach

A

lateral epicondyle of humerus

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14
Q

extensor digitorum (ED) distal attach

A

extensor expansions of medial four digits (central slip to base of middle phalanx; distal terminal insertion to base of distal phalanx)

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15
Q

extensor digitorum (ED) axn

A

primary: extension at MCP, wrist ext
secondary: ext at PIP and DIP

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16
Q

extensor digitorum (ED) innervation

A

PIN (C7*, C8)

17
Q

extensor indicis prox attach

A

posterior surface of distal 1/3 of ulna and interosseous membrane

18
Q

extensor indicis distal attach

A

extensor expansion (hood mechanism) of 2nd digit

19
Q

extensor indicis axn

A

extends 2nd digit (especially at PIP)
secondary: wrist ext

20
Q

extensor indicis innervation

A

PIN (C7, C8*)

21
Q

extensor digiti minimi prox attach

A

lateral epicondyle of humerus

22
Q

extensor digiti minimi distal attach

A

extensor expansion of 5th digit

23
Q

extensor digiti minimi axn

A

extends 5th digit at MCP, PIP, DIP
secondary: wrist extension

24
Q

extensor digiti minimi innervation

A

PIN (C7*, C8)

25
Q

abductor pollicis longus prox attach

A

posterior surfaces of ulna, radius, and interosseous membrane

26
Q

abductor pollicis longus distal attach

A

base of 1st metacarpal bone

27
Q

abductor pollicis longus axn

A

abduct thumb at CMC
secondary: extends thumb at CMC

28
Q

abductor pollicis longus innervation

A

PIN (C7, C8*)

29
Q

extensor pollicis brevis (EPB) prox attach

A

posterior surface of distal 1/3 of radius and interosseous membrane

30
Q

extensor pollicis brevis (EPB) distal attach

A

dorsal aspect of base of proximal phalanx of thumb

31
Q

extensor pollicis brevis (EPB) axn

A

extends MCP of thumb and extends metacarpal at CMC

32
Q

extensor pollicis brevis (EPB) innervation

A

PIN (C7, C8*)

33
Q

extensor pollicis longus (epl) prox attach

A

posterior surface of middle third of ulna and interosseous membrane

34
Q

extensor pollicis longus (epl) distal attach

A

dorsal aspect of base of distal phalanx of thumb

35
Q

extensor pollicis longus (epl) axn

A

extends distal phalanx of thumb at IP
secondary: extends MCP and CMC of thumb
*can adduct thumb if IP extended and laterally rotate thumb

36
Q

extensor pollicis longus (epl) innervation

A

PIN (C7, C8*)

Functional Anatomy (7 decks)

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