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MSK Final > Arm and Forearm > Flashcards

Arm and Forearm Flashcards

1
Q

Proximal attachment of biceps brachii

A

long head: supraglenoid tubercle of scapula

short head: coracoid process of scapula

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2
Q

Distal attachment of biceps brachii

A

radial tuberosity and fascia of forearm via bicipital aponeurosis

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3
Q

actions of of biceps brachii

A

supinates forearm and flexes forearm when supine; resists dislocation of shoulder (short head)

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4
Q

blood supply of biceps brachii

A

brachial artery

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5
Q

innervation of biceps brachii

A

musculotaneous nerve (C5, C6)

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6
Q

proximal attachment of coracobrachialis

A

coracoid process of scapula

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7
Q

distal attachment of coracobrachialis

A

middle 1/3 of medial humeral surface

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8
Q

actions of coracobrachialis

A

flexes and adducts arm at shoulder joint; resists dislocation of shoulder joint

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9
Q

blood supply of coracobrachialis

A

brachial artery

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10
Q

innervation of coracobrachialis

A

musculotaneous nerve (C5, C6, C7)

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11
Q

proximal attachment of brachialis

A

distal 1/2 of anterior surface of humerus

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12
Q

distal attachment of brachialis

A

coronoid process and tuberosity of ulna

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13
Q

actions of brachialis

A

flexes forearm at elbow joint

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14
Q

blood supply of brachialis

A

brachial artery

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15
Q

innervation of brachialis

A

musculocutanous nerve (C5, C6); lateral portions may receive radial nerve contributions

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16
Q

Which muscles are innervated by the radial nerve?

A

triceps brachii (long head, lateral head, medial head) and anconeus

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17
Q

proximal attachment of anconeus

A

lateral epicondyle of humerus

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18
Q

distal attachment of anconeus

A

lateral surface of olecranon; superior part of surface of ulna

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19
Q

actions of anconeus

A

assists triceps in extension of forearm and stabilizes elbow joint; also abducts ulna during pronation

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20
Q

blood supply of anconeus

A

deep brachial artery

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21
Q

innervation of anconeus

A

radial nerve (C7, C8, T1)

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22
Q

proximal attachment of triceps brachii

A

long: infraglenoid tubercle
lateral: posterior surface of humerus
medial: posterior surface of humerus, inferior radial groove

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23
Q

actions of triceps brachii

A

extends forearm at elbow joint (main); resists dislocation of shoulder joint (long head)

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24
Q

blood supply of triceps brachii

A

deep brachial artery

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25
Q

innervation of triceps brachii

A

radial nerve (C6, C7, C8)

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26
Q

What are the boundaries of the cubital fossa?

A

lateral: brachioradialis
medial: pronator teres
superior: an imaginary line between medial and lateral epicondyles of humerus
roof: skin, superfical and deep fascia, bicipital aponeurosis
floor: supinator and brachialis

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27
Q

What are the contents of the cubital fossa?

A

median nerve, bifurcation of radial and ulnar arteries, brachial veins (venae comitantes), tendon of biceps brachii and bicipital aponeurosis, radial nerve (deep and superficial radial nerves)

28
Q

proximal attachment of pronator teres

A

coronoid process of ulna

29
Q

distal attachment of pronator teres

A

middle of lateral surface of radius

30
Q

actions of pronator teres

A

pronates and flexes forearm at elbow

31
Q

blood supply of pronator teres

A

anterior ulnar recurrent artery

32
Q

innervation of pronator teres

A

median nerve (C6, C7)

33
Q

proximal attachment of flexor carpi radialis

A

medial epicondyle of humerus

34
Q

distal attachment of flexor carpi radialis

A

base of 2nd metacarpal

35
Q

actions of flexor carpi radialis

A

flexes and abducts hand at wrist

36
Q

blood supply of flexor carpi radialis

A

ulnar artery

37
Q

innervation of flexor carpi radialis

A

median nerve (C6, C7)

38
Q

proximal attachment of palmaris longus (can be absent)

A

medial epicondyle of humerus

39
Q

distal attachment of palmaris longus (can be absent)

A

flexor retinaculum; continuous with palmar aponeurosis

40
Q

actions of palmaris longus (can be absent)

A

flexes hand at wrist; tenses palmar aponeurosis

41
Q

blood supply of palmaris longus (can be absent)

A

ulnar artery

42
Q

innervation of palmaris longus (can be absent)

A

median nerve (C7, C8)

43
Q

proximal attachment of flexor carpi ulnaris

A

medial epicondyle of humerus (humeral head); olecranon and posterior border of ulna (ulnar head)

44
Q

distal attachment of flexor carpi ulnaris

A

pisiform, hook of hamate, 5th metacarpal

45
Q

actions of flexor carpi ulnaris

A

flexes and adducts hand at wrist

46
Q

blood supply of flexor carpi ulnaris

A

ulnar artery

47
Q

innervation of flexor carpi ulnaris

A

ulnar nerve (C7, C8)

48
Q

proximal attachment of flexor digitorum superficialis

A

medial epicondyle of humerus, superior 1/2 of anterior border of radius

49
Q

distal attachment of flexor digitorum superficialis

A

shafts of middle phalanges of medial 4 digits

50
Q

actions of flexor digitorum superficialis

A

flexes middle phalanges at proximal interphalangeal joint; flexes proximal phalanges at metacarpophalangeal joints

51
Q

blood supply of flexor digitorum superficialis

A

ulnar artery

52
Q

innervation of flexor digitorum superficialis

A

median nerve (C7, C8, T1)

53
Q

proximal attachment of flexor digitorum profundus

A

proximal 3/4 of medial and anterior surfaces of ulna and interosseus membrane

54
Q

distal attachment of flexor digitorum profundus

A

bases of distal phalanges of 2nd-5th fingers

55
Q

actions of flexor digitorum profundus

A

flexes distal phalanges at interphalangeal joints (power grip)

56
Q

blood supply of flexor digitorum profundus

A

anterior interosseus artery

57
Q

innervation of flexor digitorum profundus

A

anterior interosseus branch of median n.; medial aspect - ulnar n.

58
Q

proximal attachment of flexor pollicis longus

A

anterior surface of radius and interosseus membrane

59
Q

distal attachment of flexor pollicis longus

A

base of distal phalanx of thumb

60
Q

actions of flexor pollicis longus

A

flexes thumb

61
Q

blood supply of flexor pollicis longus

A

anterior interosseus artery

62
Q

innervation of flexor pollicis longus

A

median nerve via anterior interosseus nerve (C8, T1)

63
Q

proximal attachment of pronator quadratus

A

distal 1/4 of anterior surface of ulna

64
Q

distal attachment of pronator quadratus

A

distal 1/4 of anterior surface of radius

65
Q

actions of pronator quadratus

A

pronates forearm, deep fibers bind radius and ulna together

66
Q

blood supply of pronator quadratus

A

anterior interosseus artery

67
Q

innervation of pronator quadratus

A

median nerve via anterior interosseus nerve (C8, T1)

MSK Final (7 decks)

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