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MSK anatomy > Upper limb 2 > Flashcards

Upper limb 2 Flashcards

1
Q

3 muscles of anterior/flexor compartment of arm

A

brachialis
biceps brachii
coracobrachialis

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2
Q

Biceps brachii heads

A

2 (long+short) arise from scapula

both heads unite at distal 1/3 of upper arm and form tendon to insert into radial tuberosity

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3
Q

What joints does biceps brachii act on?

A

shoulder
elbow
radio-ulnar

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4
Q

Which head of biceps arise from coracoid process along with coracobrachialis?

A

short

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5
Q

Long head of biceps pathway

A

supraglenoid tubercle and runs in bicipital groove of humerus

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6
Q

Tendon of biceps attached distally

A

radial tuberosity

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7
Q

biceps - shoulder and elbow action

A

flexion

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8
Q

Biceps on superior radio-ulnar joint

A

supinator and flexor

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9
Q

Nerve supply to biceps

A

musculocutaneous - C5/6

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10
Q

Action of coracobrachialis on shoulder

A

flexion and adduction

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11
Q

Nerve supply to coracobrachialis

A

musculocutaneous

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12
Q

Brachialis origin and insertion

A

shaft of humerus –> cornonoid process of ulna

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13
Q

Coracobrachialis origin and insertion

A

tip of coracoid process –> medial margin of humerus

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14
Q

Brachialis on elbow joint

A

flexion

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15
Q

Nerve supply to brachialis

A

musculocutaneous

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16
Q

How does musculocutaneous nerve enter arm?

A

perforate coracobrachialis and descend between biceps and brachialis

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17
Q

musculocutaneous nerve roots

A

C5-7

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18
Q

Why is nerve called musculocutaneous?

A

innervates anterior muscles of arm

sensation from lateral aspect of arm

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19
Q

Does musculocutaneous nerve supply any muscles in forearm or hand?

A

no

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20
Q

Knife in axilla - musculocutaneous

A

paralysis of BBC muscles

loss of sensation on lateral aspect of arm

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21
Q

Deep artery of arm

A

profundal brachii

22
Q

Median nerve pathway

A

lateral side of axillary artery and upper part of brachial artery
middle part of arm crosses to medial side and enters cubital fossa

23
Q

Does median nerve supply any muscles in arm?

A

No

24
Q

How does ulnar nerve enter posterior compartment?

A

medial intermuscular septum

run along medial head of triceps and medial epicondyle

25
Q

Does ulnar nerve innervate any muscles in arm?

A

no

26
Q

3 common sites of humerus and 3 nerve injuries

A

axillary - surgical neck
ulnar - medial epicondyle
radial - radial groove

27
Q

What is the cubital fossa?

A

triangular depression in front of elbow

28
Q

Pulsation medial to tendon of biceps brachii

A

brachial artery

29
Q

base of cubital fossa

A

imaginary line between 2 epicondyles of humerus

30
Q

medial border of cubital fossa

A

pronator teres

31
Q

lateral border of cubital fossa

A

brachioradialis

32
Q

Muscle of posterior compartment of arm

A

triceps

33
Q

triceps origin and insertion

A

long head from scapula
2 shorter heads (medial and lateral) from humerus
common tendon into olecranon process of ulna

34
Q

olecranon process and coronoid process - which bone?

A

ulna

35
Q

main action of triceps on elbow

A

extension

36
Q

Anconeus function

A

extension and stabilise

37
Q

triceps and anconeus innervation

A

radial nerve

38
Q

Radial nerve

A

extensor compartment of arm and forearm

39
Q

Radial nerve path

A

enters arm anterior to long head of triceps
runs with profundal femoris
curves around radial groove

40
Q

Radial nerve roots

A

C5-T1

41
Q

Radial nerve injury sign

A

wrist drop

42
Q

Elbow joint type

A

synovial hinge

43
Q

articulating parts of elbow

A

capitulum, trochlea, radius, ulna

44
Q

Elbow ligaments

A

ulnar collateral and radial collateral

45
Q

What ligament holds the head of radius?

A

annular

46
Q

flexors of elbow joint

A

BBC muscles

47
Q

Extensors of elbow joint

A

triceps, anconeus

48
Q

olecranon bursitis

A

students elbow

49
Q

Radio-ulnar joint types

A

synovial pivot

50
Q

Supination muscles

A

supinator

biceps brachii **

51
Q

Pronation muscles

A

pronator teres

pronator quadratus **

MSK anatomy (8 decks)

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