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Musculoskeletal System > Posterior Forearm > Flashcards

Posterior Forearm Flashcards

1
Q

What nerve innervates the brachioradialis?

A

radial nerve

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2
Q

What is the only posterior compartment forearm muscle that flexes the forearm?

A

Brachioradialis

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3
Q

How many muscles lay in the posterior forearm and in how many layers?

A

12 muscles

2 layers

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4
Q

What are the generalised functions of the posterior forearm compartment?

A

Extension and supination

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5
Q

All muscles in the posterior forearm are innervated by …

A

The radial nerve

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6
Q

Name the superficial muscles of the posterior forearm

A 
Brachioradialis 
Extensor carpi radialis longus
Extensor carpi radialis brevis 
Extensor digitorum
Extensor carpi ulnaris 
Anconeus
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7
Q

Name the deep muscles of the posterior forearm

A 
Supinator
Abductor pollicis longus 
Extensor pollicis longus
Extensor indicis 
Extensor digiti minimi
Extensor pollicis brevis
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8
Q

What forms the medial border of the anatomical snuffbox?

A

Tendon of extensor pollicis longus

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9
Q

What forms the lateral border of the anatomical snuffbox?

A

Tendon of abductor pollicis longus

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10
Q

What passes through the anatomical snuffbox?

A

radial artery

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11
Q

What is the origin of brachioradialis?

A

Lateral supra epicondylar ridge of humerus

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12
Q

What is the insertion of brachioradialis?

A

Distal radius

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13
Q

What is the action of brachioradialis?

A

Flex elbow

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14
Q

What is the origin of ECRL?

A

Lateral supracondylar ridge of humerus

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15
Q

What is the origin of ECRB?

A

Lateral epicondyle of humerus

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16
Q

What is the attachment for both ECR muscles?

A

Metacarpals II and III

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17
Q

What are the actions of the ECR muscles?

A

Extend and abduct wrist

18
Q

What is the origin of extensor digitorum?

A

Lateral epicondyle humerus

19
Q

What is the insertion of extensor digitorum?

A

Extensor hood of each finger

20
Q

What is the action of extensor digitorum?

A

Extends medial 4 digits at MCP and IP joints

21
Q

What is the origin of extensor digiti minimi?

A

Lateral epicondyle humerus

22
Q

What is the insertion of extensor digiti minimi?

A

Extensor hood of little finger

23
Q

What is the action of EDM?

A

Extends little finger and contributes to extension of wrist

24
Q

What is the origin of ECU?

A

Lateral epicondyle humerus

25
Q

What is the insertion of ECU?

A

Base of metacarpal V

26
Q

What is the action of ECU?

A

Extends and adducts wrist

27
Q

What is the origin of anconeus?

A

Lateral epicondyle humerus

28
Q

What is the insertion of anconeus?

A

Olecranon

29
Q

What is the action of anconeus?

A

Move ulna during pronation

Extend elbow

30
Q

What is the medical term for Tennis elbow?

A

Lateral epicondylitis

31
Q

What is the insertion of supinator?

A

Radius

32
Q

What is the origin of APL?

A

Posterior radius and ulna

33
Q

What is the insertion of APL?

A

Lateral side of base of metacarpal I

34
Q

What is the origin of EPB?

A

Posterior radius

35
Q

What is the insertion of EPB?

A

Base of proximal phalanx of thumb

36
Q

What is the action of EPB?

A

Extends at MCP and CMC joints of thumb

37
Q

What is the origin of EPL?

A

Posterior ulna

38
Q

What is the insertion of EPL?

A

Distal phalanx of thumb

39
Q

What is the action of EPL?

A

Extends all joints of thumb

40
Q

What is the origin of EIP?

A

Posterior ulna

41
Q

What is the insertion of EIP?

A

Extensor hood of index finger

Musculoskeletal System (26 decks)

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