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Clinical Anatomy I > Posterior Forearm > Flashcards

Posterior Forearm Flashcards

1
Q

Superficial layer of the posterior compartment of the forearm

A

Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris

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2
Q

Brachioradialis attachments

A

from… the lateral supracondylar ridge of the humerus
to… the distal radius lateral to the styloid process

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3
Q

Brachioradialis actions

A

flexes the elbow

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4
Q

Brachioradialis innervation

A

PNS: radial nerve
CNS: C5-6

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5
Q

Extensor carpi radialis longus attachments

A

from… the lateral supracondylar ridge of the humerus
to… the base of the 2nd metacarpal

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6
Q

Extensor carpi radialis longus actions

A

extends & abducts hand at wrist (radial deviation) & assists in flexion of the elbow

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7
Q

Extensor carpi radialis longus innervations

A

PNS: radial nerve
CVS: C6-8

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8
Q

Extensor carpi radialis brevis attachments

A

from… lateral epicondyle of the humerus (common extensor origin)
to… the base of the 3rd metacarpal

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9
Q

Extensor carpi radialis brevis actions

A

extends & abducts hand at wrist (radial deviation)

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10
Q

Extensor carpi radialis brevis innervation

A

PNS: radial nerve
CNS: C6-8

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11
Q

Extensor digitorum attachments

A

from… the lateral epicondyle of the humerus (common extensor origin)
to… the extensor expansions of digits 2-5

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12
Q

Extensor digitorum actions

A

extends phalanges (primarily at metacarpophalangeal, secondarily at interphalangeal) & extends hand at wrist

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13
Q

Extensor digitorum innervations

A

PNS: radial nerve
CNS: C6-8

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14
Q

Extensor digiti minimi attachments

A

from… the lateral epicondyle of the humerus (common extensor origin)
to… the digital expansion of the 5th digit

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15
Q

Extensor digiti minimi actions

A

extends 5th digit (metacarpophalangeal & interphalangheal)

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16
Q

Extensor digiti mini innervations

A

PNS: radial nerve
CNS: C7-8

17
Q

Extensor carpi ulnaris attachments

A

from… the lateral epicondyle of the humerus (common extensor origin)
to… the base of the 5th metacarpal

18
Q

Extensor carpi ulnaris actions

A

extends & adducts hand at wrist (ulnar deviation)

19
Q

Extensor carpi ulnaris innervations

A

PNS: radial nerve
CNS: C6-8

20
Q

Deep layer of the posterior compartment of the forearm

A

Supinator
Extensor indicis

21
Q

Supinator attachments

A

from… the lateral epicondyle of the humerus, radial collateral ligament & supinator crest of the ulna
to… the lateral surface of the proximal radius

22
Q

Supinator actions

A

supinates forearm

23
Q

Supinator innervations

A

PNS: radial nerve
CNS: C5-6

24
Q

Extensor indicis attachments

A

from… the posterior surface of the ulna & interosseous membrane
to… the digital expansion of the 2nd digit

25
Q

Extensor indicis actions

A

extends 2nd digit (metacarpophalangeal & interphalangeal

26
Q

Extensor indicis innervations

A

PNS: radial nerve
CNS: C7-8

27
Q

Deep layer of the posterior compartment of the forearm (outcropping thumb muscles)

A

Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus

28
Q

Abductor pollicis longus attachments

A

from… proximal posterior radius, ulna & interosseous membrane
to… the base of the 1st metacarpal & trapezium

29
Q

Abductor pollicis longus actions

A

abducts & extends thumb at carpometacarpal joint & abducts hand at wrist (radial deviation)

30
Q

Abductor pollicis longus innervation

A

PNS: radial nerve
CNS: C6-8

31
Q

Extensor pollicis brevis attachments

A

from… the posterior radial surface & interosseous membrane
to… the base of the 1st proximal phalanx

32
Q

Extensor pollicis brevis actions

A

extends thumb (metacarpophalangeal) & extends & abducts CMC joint

33
Q

Extensor pollicis brevis innervations

A

PNS: radial nerve
CNS: C6-8

34
Q

Extensor pollicis longus attachments

A

from… the middle 1/3rd of the posterior surface of the ulna & interosseous membrane
to… the base of the 1st distal phalanx

35
Q

Extensor pollicis longus actions

A

extends thumb (CMC & metacarpophalangeal & interphalangeal)

36
Q

Extensor pollicis longus innervations

A

PNS: radial nerve
CNS: C6-8

37
Q

Radial nerve muscular branches

A

Brachioradialis
Supinator
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Extensor digitorum
Extensor digiti minimi
Extensor indicis
Extensor pollicis brevis
Extensor pollicis longus
Abductor pollicis longus

Clinical Anatomy I (44 decks)

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