Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

from flashcardlet > Anatomy Chapter 6 - Antebrachium > Flashcards

Anatomy Chapter 6 - Antebrachium Flashcards

1
Q

What membranes create the anterior and posterior compartments of the forearm?

A

Interosseous membrane and lateral intramuscular septum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What kind of joint is located between the bones of the radius and ulna?

A

Syndesmoses - long fibers allow movement for pronation and supination

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does the flexor retinaculum do?

A

Holds down the tendons of the forearm so they don’t bowstring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What kind of tissue is the flexor retinaculum?

A

Deep fascia made of dense regular CT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Is the radial head proximal or distal?

A

Proximal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Is the ulnar head proximal or distal?

A

Distal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Are the radial and ulnar tuberosities proximal or distal?

A

Proximal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Where is the radial tubercle?

A

Posterior radius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Are the styloids proximal or distal?

A

Distal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Is the ulnar coronoid process proximal or distal?

A

Proximal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which styloid process protrudes farther distally?

A

Radial

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Where is the Colles fracture?

A

Distal radius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is a comminuted fracture?

A

Has fragments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why is a Colles fracture common in elderly women?

A

Due to weak and vulnerable spot in radius and osteoporosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the dinner fork deformity?

A

Fall onto hand causes ulnar styloid to be avulsed, shortening of the radius due to posterior angulation occurring in the forearm and anterior curvature of the hand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What kind of fracture produces the dinner fork deformity?

A

Colles fracture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Why does the forearm have two pivot joints?

A

For pronation and supination

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Where does the axis of the forearm cross?

A

Head of radius and styloid of ulna

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Which bone in the forearm moves during pronation and supination?

A

Radius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What does the distal radioulnar joint look like?

A

Ulnar notch glides over the ulna like a tether ball

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What does the proximal radioulnar joint look like?

A

Swivels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is nursemaid’s elbow?

A

Subluxation of the head of the radius - child is suddenly lived by thte upper limb tearing the distal attachment of the aular ligament where it is loosely attached to the neck of the radius
Radius moves out of socket

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is the source of pain in subluxation of the radial head?

A

Pinching of the annular ligament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

How do we treat subluxation of the radial head?

A

Forcefully supinate and extend the forearm, popping the annular ligament and radius back into place

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What is the triangular ligament?

A

Articular disc of distal radioulnar joint - located between palmar and dorsal radioulnar ligaments and the medial side of the radius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What does the triangular ligament do?

A

Separates the wrist joint from the radioulnar joint - separates the head of the ulna

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What shape is the synovial cavity of the distal radioulnar joint?

A

L shaped

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Where is the palmar radioulnar ligament?

A

From styloid process of ulna, over head of ulna to attach to medial anterior side of radius

29
Q

Where is the dorsal radioulnar ligament?

A

Wraps from styloid process of the ulna to the posterior side of radius

30
Q

What is the function of the dorsal radioulnar ligament?

A

Allows hand to follow pronation

31
Q

What is the function of the palmar radioulnar ligament?

A

Allows hand to follow supination

32
Q

What are the bones of the proximal row of the carpus?

A

Scaphoid
Lunate
Triquetrum
Pisiform

33
Q

What are the bones of the distal row of the carpus?

A

Trapezium
Trapezoid
Capitate
Hamate

34
Q

What four bones articulate with the radio carpal joint?

A

Scaphoid, lunate, triquetrum, and radius

35
Q

What joints in the hand have very little movement?

A

Intercarpal joints

36
Q

What kind of joint is the radio carpal joint?

A

Condyloid synovial

37
Q

What do the radial and ulnar collateral ligaments function in?

A

Limit the movement of abduction and adduction

38
Q

Which collateral ligament limits adduction?

A

Ulnar

39
Q

Which collateral ligament limits abduction?

A

Radial

40
Q

What is the pollux?

A

Thumb

41
Q

What are the four muscles of the superficial layer of the anterior forearm?

A

Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris

42
Q

What superficial flexor muscle is absent in 1/10 cadavers?

A

Palmaris longus

43
Q

What is the intermediate flexor muscle of the superficial layer of the anterior forearm?

A

Flexor digitorum superficialis

44
Q

What are the three muscles of the deep layer of the anterior forearm?

A

Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus

45
Q

Why does the flexor digitorum superficialis split?

A

Follows middle phalanx then splits to insert medially and laterally allowing for the deep tendon to attach on the distal phalynx

46
Q

What nerve innervates all flexors except for 1.5?

A

Median nerve

47
Q

What flexor muscles of the forearm are not innervated by the median nerve?

A

Flexor carpi ulnaris - ulnar nerve

Medial part of flexor digitorum profundus - ulnar

48
Q

What are the extensor muscles of the superficial layer of the forearm?

A 
Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris
49
Q

What are the extensor muscles of the deep layer of the forearm?

A

Supinator

Extensor indicis

50
Q

What are the outcropping extensor muscles of the forearm?

A

Abductor pollicis longus
Extensor pollicis longus
Extensor pollicis brevis

51
Q

What nerve innervates all posterior forearm muscles?

A

Radial nerve

52
Q

What is claw hand due to?

A

Damage to the ulnar nerve - median nerve still functions and allows 1,2,3 to flex

53
Q

What is the benediction hand due to?

A

Damage to the median nerve - ulnar nerve still functions and allows 4,5 to flex

54
Q

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

A

Brachioradialis - it is actually located anteriorly but still in posterior compartment due to location of the lateral inter muscular septum
(still innervated by the radial nerve like all of posterior compartment)

55
Q

What is the outcropping of muscles due to?

A

Tendons go around the tubercle of the radius and change direction to the tumb

56
Q

What is different about flexion/extension etc in the thumb?

A

Thumb lies in a different plane - it is rotated 90 degrees

57
Q

What artery continues as the deep palmar arch?

A

Radial artery

58
Q

What artery continues as the superficial palmar arch?

A

Ulnar artery

59
Q

Which digits are the strongest extensors and why?

A

2nd and 5th digits are the strongest because they have two muscles working to extend them

60
Q

What are the branches of the common interosseous artery?

A

Anterior, posterior and recurrent

61
Q

What is the allen test?

A

A check for profusion through the radial and ulnar arteries - Occlude both arteries, then allow flow through ulnar artery (because radial artery will be collected from) if color does not return to palmar surface, ulnar artery supply to the hand is not sufficient and it is not safe to prick the radial artery for a blood draw

62
Q

When is the allen test performed?

A

Before performing an ABG

63
Q

What does the ulnar nerve innervate?

A

1.5 muscles in forearm and most of the extensors of the hand

64
Q

What are the borders of the snuff box?

A

Extensor pollicis brevis tendon
Extensor pollicis longus tendon
Scaphoid and trapezium is floor
Styloid process of radius

65
Q

Why are injuries to the snuff box hard to heal?

A

Poor blood supply

66
Q

What bone is typically fractured if there is snuff box tenderness?

A

Scaphoid

67
Q

What artery is located in the snuff box?

A

Radial artery

68
Q

What nerve is located in the snuff box?

A

Superficial branch of the radial nerve

from flashcardlet (133 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions