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MSK Anatomy > Shoulder joint, Posterior Arm and Posterior Forearm > Flashcards

Shoulder joint, Posterior Arm and Posterior Forearm Flashcards

1
Q

what is the glenohumeral joint?

A

shoulder joint

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2
Q

name the 4 ligaments of the glenohumeral joint

A

glenohumeral ligaments

coraco-humeral ligament

transverse humeral ligament

coraco-acromial ligament

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3
Q

where is the glenohumeral ligaments

A

these are 3 fibrous bands on the internal aspect of the capsule

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4
Q

where is the coraco-humeral ligament?

A

passes from base of coracoid process to anterior aspect of greater tubercle of humerus

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5
Q

where is the transverse humeral ligament?

A

runs from greater tubercle of humerus to cular sulcus

holds biceps brchii tendon in place

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6
Q

what does the coraco-acromial ligament + coracoid process+acromion make?

A

coraco-acromial arch

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7
Q

what does the coraco-acromial arch do?

A

protects the humeral head from displacing superiorly from glenoid cavity

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8
Q

where does the subacromial bursa lie?

A

lies over the fibrous capsule of the joint

located between the acromion, coraco-acromial ligament+deltoid superiorly and the supraspinatus tendon inferiorly

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9
Q

what are the 2 attachments of the joint capsule?

A

glenoid labrum

anatomical neck of humerus

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10
Q

what nerve supplies the deltoid?

A

axillary

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11
Q

what nerve supplies teres minor?

A

axillary

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12
Q

what nerve could be damaged in anterior shoulder dislocation?

A

axillary

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13
Q

what are the ligament of the elbow joint?

A

the radial and ulnar collateral ligaments

anular ligament of radius

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14
Q

is there a radio-ulnar joint?

A

yes

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15
Q

capitulum is on radial or ulnar side?

A

radial

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16
Q

trochlea is on radial or ulnar side?

A

ulnar

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17
Q

what does the radial collateral ligament blend with/

A

anaular ligament of radius

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18
Q

name the muscles in the posterior arm?

A

triceps brachii

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19
Q

name the 3 head of triceps brachii?

A

long head
lateral head
medial head

20
Q

what nerve supplies triceps brachii?

A

radial nerve

21
Q

what action does triceps brachii do?

A

extend forearm

22
Q

which head of triceps brachii is the strongest?

A

lateral head

23
Q

which head is the least active of triceps brachii?

24
Q

what is the deep artery of the arm

A

profunda brachii artery

25
Q

what is the longest branch of the brachial artery?

A

profunda brachii artery

26
Q

what does the profunda brachii artery accompany along the radial groove as it passes posteriorly around shaft of humerus?

A

radial nerve

27
Q

what nerve supplies all muscles in the posterior arm and forearm?

A

radial nerve

28
Q

what is more medial the radial artery or nerve/

A

the radial nerve is more medial

29
Q

name the superficial muscles in the posterior forearm (6)

A 
brachioradialis
extensor carpi radialis longus (ECRL)
extensor carpi radialis brevis (ECRB)
extensor digitorum
extensor digit minimi (EDM)
extensor carpi ulnaris (ECU)
30
Q

what is the main action of brachioradialis?

A

flexion of semi-pronated arm (like drinking from a cup)

31
Q

which muscle is active during fist clenching?

A

extensor carpi radialis longus

32
Q

what is the action of extensor carpi radialis longus and brevis?

A

extend and abduct hand at wrist

33
Q

which muscle extends the medial 4 digits

A

extensor digitorum

34
Q

which muscle extends the 5th digit?

A

extensor digiti minimi

35
Q

what does extensor carpi ulnaris do?

A

extend and adduct hand at wrist joint

36
Q

name the deep muscles in the posterior forearm (5)

A 
supinator
extensor indicic
abductor pollicis longus
extensor pollicis longus
extensor pollicis brevis
37
Q

what does the supinator muscle do/

A

supinates forearm

38
Q

what does extensor indicis do/

A

extends 2nd digit

39
Q

what does abductor pollicis longus do?

A

abduct thumb and extends it

40
Q

what does extensor pollicis longus do/

A

extend distal phalanx of thumb

41
Q

what does extensor pollicis brevis do?

A

extend proximal phalanx of thumb

42
Q

what is the common proximal attachment for the superficial posterior forearm muscles ?

A

the common extensor tendon on the lateral epicondyle

43
Q

what is the common proximal attachment for the deep forearm muscles/

A

shafts of radius and ulna and interosseous membrane

44
Q

what is the posterior interosseous nerve a branch of?

A

its a deep branch of the radial nerve which supplies the posterior forearm

45
Q

what is the arterial supply to the posterior forearm?

A

posterior interosseous artery (a branch from ulnar artery)

46
Q

what is and what is the function of the extensor retinaculum?

A

a sheath which holds all the tendons of muscles in place at the wrist

47
Q

what are the 4 rotator cuff muscles?

A

supraspinatus
infraspinatus
subscapularis
teres minor

MSK Anatomy (12 decks)

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