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Gross Anatomy II NYCC > Arm (Brachium) > Flashcards

Arm (Brachium) Flashcards

1
Q

name the muscles of the anterior compartment of the arm

A

biceps brachii
coracobrachialis
brachialis

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2
Q

what nerve innervates the muscles of the anterior compartment of the arm?

A

musculocutaneous n

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3
Q

name the muscles of the posterior compartment of the arm

A

triceps brachii

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4
Q

what nerve innervates the muscles of the posterior compartment of the arm?

A

radial n

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5
Q

the medial intermuscular septum of the arm contains what structures?

A

median n
ulnar n
brachial a

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6
Q

the lateral intermuscular septum contains what structures?

A

radial n
profunda brachii a

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7
Q

origin of biceps brachii

A

long head: supraglenoid tubercle of scapula
short head: coracoid process of scapula

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8
Q

insertion of biceps brachii

A

radial tuberosity

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9
Q

innervation & spinal level of biceps brachii

A

musculocutaneous n (C6)

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10
Q

actions of biceps brachii

A
  1. forearm supination
  2. simple forearm flexion when elbow extended and forearm supinated
  3. long head = stabilizer of glenohumeral joint
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11
Q

what nerve root is associated with the deep tendon reflex of biceps brachii?

A

C5

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12
Q

origin & insertion of coracobrachialis

A

O: coracoid process, scapula
I: medial surface of middle humerus

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13
Q

innervation & spinal levels of coracobrachialis

A

musculocutaneous n (C6)

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14
Q

action of coracobrachialis

A

flex & adduct humerus at glenohumeral joint

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15
Q

origin & insertion of brachialis

A

O: distal half of anterior humerus (where coracobrachialis ends)
I: ulnar tuberosity & anterior surface of coronoid process

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16
Q

innervation & spinal levels of brachialis

A

musculocutaneous n (C6, sometimes C7 from radial n)

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17
Q

action of brachialis

A
  • flex forearm at elbow in any position
  • controlled relaxation during extension of forearm to gently place object down
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18
Q

musculocutaneous nerve lies deep to ____ and superficial to ____

A

biceps brachii
brachialis

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19
Q

peripheral entrapment sites of musculocutaneous n

A
  1. coracobrachialis (n pierces through)
  2. space between biceps brachii & brachialis
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20
Q

symptoms of peripheral entrapment of musculocutaneous n

A
  • lateral forearm paresthesia (occurs first)
  • weak supination & flexion
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21
Q

peripheral entrapment sites of lateral antebrachial cutaneous n

A

biceps brachii & brachialis (where it exits)

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22
Q

symptoms of peripheral entrapment of lateral antebrachial cutaneous n

A

lateral forearm paresthesia without weakness (no motor function here)

23
Q

name the 3 branches off the brachial artery

A

profunda brachii a
superior ulnar collateral a
inferior ulnar collateral a

24
Q

the brachial artery is a continuation of the ____ after it passes the ____

A

axillary a
teres major

25
Q

the artery that runs with the radial nerve is the ____

A

profunda brachii a

26
Q

the artery that branches off the middle of the brachial artery and runs with the ulnar nerve is the ____

A

superior ulnar collateral a

27
Q

superior ulnar collateral artery runs with what nerve?

A

ulnar n

28
Q

superior ulnar collateral artery anastomoses with ____

A

posterior ulnar recurrent a
(superior ulnar collateral a runs with ulnar n through groove on posterior side)

29
Q

radial collateral artery anastomoses with ____

A

radial recurrent a

30
Q

what artery runs anterior to the medial epicondyle?

A

inferior ulnar collateral a

31
Q

inferior ulnar collateral artery anastomoses with ____

A

anterior ulnar recurrent a

32
Q

the brachial artery runs with what nerve?

A

median n

33
Q

origins of triceps brachii

A

long: infraglenoid tubercle, scapula
lateral: posterolateral surface of humerus & lateral intermuscular septum
medial: posteromedial surface of humerus & medial intermuscular septum

34
Q

insertion of triceps brachii

A

olecranon process, ulna

35
Q

innervation & spinal levels of triceps brachii

A

radial n
C7, C8

36
Q

actions of triceps brachii

A
  • extend forearm at elbow
  • long head stabilizes GH joint and extends humerus at GH joint
37
Q

triceps brachii is associated with what nerve root reflex?

A

C7

38
Q

moving proximally up the arm, the brachial vein dumps into the ____ vein, which then dumps into the ____ vein

A

basilic v
axillary v (crosses teres major)

39
Q

moving proximally up the arm, the cephalic vein passes through the ____ and dumps into the ____ vein

A

deltopectoral triangle
axillary v

40
Q

the cephalic vein runs along the ____ side of the arm

A

lateral

41
Q

the basilic vein runs along the ____ side of the arm

A

medial

42
Q

the basilic vein runs with what nerve superficial to the cubital fossa?

A

medial antebrachial cutaneous n

43
Q

what vein connects the cephalic to the basilic vein?

A

median cubital vein

44
Q

the cephalic vein runs with what nerve superficial to the cubital fossa?

A

lateral antebrachial cutaneous n

45
Q

what structure forms the floor of the cubital fossa?

A

tendon of brachialis m

46
Q

what structure forms the base of the cubital fossa?

A

line between lateral and medial epicondyles

47
Q

what structure forms the roof of the cubital fossa?

A

bicipital aponeurosis

48
Q

what structure forms the lateral border of the cubital fossa?

A

brachioradialis m

49
Q

what structure forms the medial border of the cubital fossa?

A

pronator teres m

50
Q

what are the contents of the cubital fossa?

A

brachial v
median n
brachial a

51
Q

describe the orientation of the radial nerve through the upper arm

A

begins posterior, runs posterolateral, then anterolateral along spiral groove of humerus

52
Q

the radial nerve separates what 2 muscles lateral to the cubital fossa?

A

brachioradialis & brachialis

53
Q

describe the path of the radial nerve as it approaches the cubital fossa

A

travels lateral to cubital fossa, branches into deep & superficial branches of radial n

54
Q

name the potential entrapment sites of the radial nerve in the arm

A
  • at the spiral groove
  • between brachioradialis & brachialis

Gross Anatomy II NYCC (18 decks)

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