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Musculoskeletal > 1.3.3 Ventral Forearm > Flashcards

1.3.3 Ventral Forearm Flashcards

1
Q

What joins the radius and ulna in the forearm?

A

interosseus membrane

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2
Q

What are the two compartments of the forearm? What divides them?

A

Ventral and dorsal divided by interosseus membrane

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3
Q

What are the two demarcations b/t the compartments of the forearm?

A

subcutaneous border of the ulna, posteriorly

radial artery anteriorly to laterally

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4
Q

Where do the muscles in the anterior compartment orginate?

A

the medial epicondyle and the epicondyle ridge of humerus

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5
Q

Where is the fleshy masses of the anterior forearm muscles?

A

Proximally

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6
Q

What are the five muscles in the superficial group?

A

Pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris (Pass, Fail, Pass, Fail)

Little deeper: flexor digitorum superficialis (FDS)

All cross the elbow joint

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7
Q

What are the three muscles of the deep group?

A

flexor digitorum profundus, flexor pollicis longus, pronator quadratus

DO NOT CROSS THE ELBOW

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8
Q

What is the main innervator of the muscles of the anterior forearm?

A

median nerve

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9
Q

Name this muscle

A

Pronator teres

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10
Q

Where does the flexor carpi radialis insert?

A

2nd metacarpal (index finger base)

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11
Q

What innervates the flexor carpi ulnaris?

A

Ulnar nerve

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12
Q

Where does the flexor carpi ulnaris insert?

A

pisiform, hook of hamate and base of 5th metacarpal bones

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13
Q

In what way can the flexor carpi ulnaris move the hand/wrist?

A

Flex and adduct

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14
Q

What does the flexor digitorum superficilias flex?

A

The proximal interphalangeal joint

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15
Q

What does the flexor digitorum profundus flex?

A

The distal interphalangeal joint

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16
Q

What innervates the flexor digitorum profundus?

A

Dual innervation

2nd and 3rd digit: median nerve

4th and 5th digit: ulnar nerve

17
Q

This muscle is the only muscle that flexes the distal interphalangeal joint of the thumb

A

Flexor pollicis longus

18
Q

What action is mediated by the pronator quadratus?

A

Pronates the forearm

19
Q

Most muscles in the anterior forearm are innervated by the median nerve. Which muscles are innervated by the ulnar nerve?

A

Flexor carpi ulnaris

ulnar half (4th and 5th digit) of flexor digitorum profundus

20
Q

Where does the median nerve run in the anterior forearm?

A

Deep to FDS, go on in the middle forearm in between FDS and FDP

21
Q

What nerve branches of the the median nerve?

A

Anterior interosseus nerve

22
Q

What branch of the median nerve goes in the palm of the hand?

A

Palmar cutaneous branch of the median nerve

23
Q

What nerve supplies innervation to the thenar muscles (controlling thumb)?

A

Recurrent branch of the median nerve

24
Q

What forms the carpal tunnel?

A

Flexor retinaculum (transverse carpal ligament)

25
Q

How does the ulnar nerve enter the hand?

A

Superficial to the flexor retinaculum through the ulnar canal or canal of Guyon (a groove b/t pisiform and hook of hamate)

26
Q

An ulnar nerve injury would have what type of abnormal gripping?

A

Claw hand

27
Q

What is the cutaneous sensation distribution of ulnar nerve?

A
28
Q

What muscle causes the compression in cubital tunnel syndrome?

A

flexor carpi ulnaris

29
Q

What are the two main arteries off the brachial artery?

A

Ulnar (larger) and radial

30
Q

What are the two recurrent arteries of the ulnar artery?

A

Anterior/posterior ulnar recurrent arteries

31
Q

What are the two types of branches of the ulnar artery in the hand?

A

Superficial/deep palmar arch

  • continuations of the ulnar arteries that anastamoses with the radial artery
32
Q

What is the main supplier of the superficial arch? Deep arch

A

US DR

Ulnar:superficial, Deep:Radial

33
Q

What is golfer elbow?

A

Medial epicondylitis

34
Q

What is popeye’s musclar claim to fame?

A

YUGE brachioradialis

35
Q
A

Musculoskeletal (53 decks)

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