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Anatomy 6 > 57: Posterior Arm and Forearm > Flashcards

57: Posterior Arm and Forearm Flashcards

1
Q

three heads of triceps and their PA

A

long head: infraglenoid tubercle of scapula
lateral head: posterior surface of humerus superior to radial groove
medial head: posterior surface of humerus inferior to radial groove

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2
Q

DA triceps

A

proximal end of olecranon process (ulna)

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3
Q

A triceps

A

extension of arm, resists dislocation of arm, extension of forearm

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4
Q

N triceps

A

radial n.

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5
Q

PA aconeus

A

lateral epicondyle of humerus

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6
Q

DA aconeus

A

lateral surface of olecranon and proximal posterior surface of ulna

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7
Q

A aconeus

A

assists in extension of forearm, stabilizes elbow joint

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8
Q

N aconeus

A

radial n.

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9
Q

PA brachioradialis

A

lateral supracondylar ridge of humerus

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10
Q

DA brachioradialis

A

styloid process of radius

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11
Q

N brachioradialis

A

radial n.

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12
Q

A brachioradialis

A

flexion of forearm

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13
Q

PA extensor carpi radialis longus

A

lateral supracondylar ridge of humerus

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14
Q

DA extensor carpi radialis longus

A

dorsal base of MC II

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15
Q

N extesnor carpi radialis longus

A

radial n.

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16
Q

A extensor carpi radialis longus

A

extends and abducts wrist

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17
Q

PA extensor carpi radialis brevis

A

lateral epicondyle of humerus

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18
Q

DA extensor carpi radialis brevis

A

dorsal base of MC II

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19
Q

N extensor carpi radialis brevis

A

deep branch of radial n.

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20
Q

A extensor carpi radialis brevis

A

extends and abducts wrist

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21
Q

PA extensor carpi ulnaris

A

lateral epicondyle of humerus

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22
Q

DA extensor carpi ulnaris

A

dorsal base of MC V

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23
Q

N extensor carpi ulnaris

A

deep branch of radial n.

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24
Q

A extensor carpi ulnaris

A

extends and adducts wrist

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25
Q

PA extensor digitorum

A

lateral epicondyle of humerus

26
Q

DA extensor digitorum

A

extensor expansion of digits 2-5

27
Q

N extensor digitorum

A

deep branch of radial n.

28
Q

A extensor digitorum

A

extends digits 2-5 at all joints; extends wrist

29
Q

PA extensor digiti minimi

A

lateral epicondyle of humerus

30
Q

DA extensor digit minimi

A

extensor expansion of digit 5

31
Q

A extensor digiti minimi

A

extend digit 5 at all joints; extends and adducts wrist

32
Q

N extensor digiti minimi

A

deep branch of radial n.

33
Q

PA supinator

A

lateral epicondyle of humerus; posterior olecranon process

34
Q

DA supinator

A

proximo-lateral radius

35
Q

N supinator

A

deep branch of radial n.

36
Q

A supinator

A

supination

37
Q

PA abductor pollicus longus

A

posterior ulna, radius, interosseous membrane

38
Q

DA abductor pollicus longus

A

base of MC I

39
Q

N abductor pollicis longus

A

posterior interosseous n.

40
Q

the posterior interosseous n. is a terminal branch of…

A

deep branch of the radial n.

41
Q

A abductor pollicis longus

A

abducts pollex

42
Q

PA extensor pollicis longus

A

posterior ulna, interosseous membrane

43
Q

DA extensor pollicis longus

A

base of distal phalanx of pollex

44
Q

N extensor pollicis longus

A

posterior interosseous n.

45
Q

A extensor pollicis longus

A

extends pollex at all joints

46
Q

PA extensor pollicis brevis

A

posteior radius, interosseous membrane

47
Q

DA extensor pollicis brevis

A

base of proximal phalanx of pollex

48
Q

N extensor pollicis brevis

A

posterior interosseous n.

49
Q

A extensor pollicis brevis

A

extends pollex at MCP joint

50
Q

DA extensor indicis

A

extensor expansion of digit 2

51
Q

PA extensor indicis

A

posterior ulna, interosseous membrane

52
Q

N extensor indicis

A

posterior interosseous n.

53
Q

A extensor indicis

A

extend the wrist and index finger at all joints

54
Q

what does the triangular interval contain?

A

radial n. and deep brachial a.

55
Q

borders of the triangular interval

A

lateral: lateral head of triceps
medial: long head of tripceps
superior: teres major

56
Q

boundaries of anatomical snuff box

A

lateral: tendons of abductor pollicis longus and extensor pollicis brevis
medial: tendon of extensor pollicis longus

57
Q

what does the antaomical snuff box contain

A

radial a.

58
Q

saturday night palsy/ honeymoon palsy/ crutch palsy “wrist drop”

A

compression of the radial n. due to pressure in the radial groove of the humerus

weakness in triceps, loss of all muscles in posterior compartment of forearm

59
Q

inability to extend thumb and MCP joints

A

damage to deep branch of radial n. at forearm level

60
Q

“handcuff palsy”

A

due to compression of superficial branch of radial nerve at wrist (from handcuffs)

paresthesia or numbness over dorsum of hand between MC I and II

Anatomy 6 (8 decks)

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