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ANATOMY 2! > Shoulder girdle Arthrology > Flashcards

Shoulder girdle Arthrology Flashcards

1
Q

What is the only true attachment to the skeleton from the shoulder girdle complex?

A

The Sternoclavicular Joint

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2
Q

Name shoulder girdle joints

A

AC joint, Scapulothoracic joint, glenohumeral joint, subacromial space, sternoclavicular joint.

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3
Q

Of all the 5 shoulder girdle joints which is not a synovial joint ?

A

Scapulothoracic joint

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4
Q

Where does the second rib attach to?

A

The sternal angle

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5
Q

Where does the 1st rib attach to?

A

The Manubrium, along with the clavicle.

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6
Q

What does the SC (sternoclavicular joint) composed of?

A

Manubrium (top part of sternum) & the clavicle.

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7
Q

Name the SC (sternoclavicular) joint ligaments.

A

Sternoclavicular lig, costoclavicular lig, & interclavicular lig

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8
Q

What is the ligament that is a “bridge” goes along the top rim of the manubrium ?

A

interclavicular lig

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9
Q

What ligament attaches from 1st rib to clavicle?

A

Costoclavicular lig

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10
Q

What does the costoclavicular ligament do?

A

it restricts SUP translation of the clavicle. also limits retraction

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11
Q

What does the sternoclavicular lig do ?

A

provides stability to entire SC Joint

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12
Q

What does the linterclavicular ligament integrate into

A

the facia of the neck

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13
Q

What kind of joint is the SC joint?

A

Sellar joint

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14
Q

What kind of motion does the SC joint do?

A

gliding and rotation motion

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15
Q

What divides the SC joint into two?

A

An Articular disc

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16
Q

What kind of joint is the AC (acromioclavicular joint)

A

Planar (gliding joint)

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17
Q

What are the ligaments of the AC joint?

A

Acromiclavicular lig & (2) Coracoclavicular lig’s (Conid & trapezoid lig)

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18
Q

which part of the clavicle has an articular disc medial or lateral?

A

Both do.

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19
Q

Where is the lateral articular disc of the clavicle located?

A

The acromioclavicular lig.

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20
Q

Where are the (2) Coracoclavicular lig’s in relation to the AC lig?

A

Medial (on the coracoid)

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21
Q

What motions do we get at the AC joint?

A

Gliding and rotation.

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22
Q

What ligament(s) is/are important in providing stability to the AC joint to decrease mobility of the AC joint.

A

The Coracoclavicular lig (both) trapezoid and conoid

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23
Q

What motion/translation happens during Protraction/retraction of scapula?

A

A-P glides of clavicle ( at AC joint)

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24
Q

What motion/translation of clavicle happens during ABD/ADD of UE?

A

Rotation of clavicle (try it)

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25
Q

What type of joint is the GH (glenohumoral) Joint?

A

Synovial

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26
Q

What type of stabilizers does the GH have?

A

Dynamic & Static

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27
Q

What joint has the largest ROM in the body?

A

GH (glenohumeral) shoulder joint.

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28
Q

Why does the GH joint have GREAT ROM?

A

1) shallow joint 2) extensive joint capsule 3) limited ligamentous support

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29
Q

Name the morphology of the clavicle ?

A

CONVEX: SUP to INF
CONCAVE: ANT to SUP

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30
Q

Name morphology of manubrium?

A

CONCAVE: SUP to INF
CONVEX: ANT to POST

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31
Q

What roll and glide happen with protraction of shoulder at SC joint?

A

ANT ROLL & glide of clavicle

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32
Q

What roll and glide happen with retraction of shoulder at SC joint?

A

POST ROLL & glide of clavicle

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33
Q

What roll and glide happen with elevation of shoulder at SC joint?

A

SUP roll and INF glide of clavicle.

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34
Q

What roll and glide happen with depression of shoulder at SC joint?

A

INF roll and SUP glide of clavicle.

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35
Q

What kind of joint is the Scapulothoracic joint?

A

Pseudo Joint

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36
Q

What muscles are involved with the Scapulothoracic joint?

A

Subscapularis and serratus ant

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37
Q

What ligament attaches to the Scapulothoracic joint?

A

none, there is no direct ligament attachment

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38
Q

What does Scapulohumeral rhythm consist of ? (joints)

A

movement of GH, ST, AC & SC joints

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39
Q

What purpose does Scapulohumeral rhythm serve?

A

1) greater shoulder ROM
2) optimal contact between humeral head and the glenoid fossa
3) Assists in optimal length-tension relationship between glenohumeral muscles.

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40
Q

Where might scapular upward rotation be greater?

A

on non-dominate side

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41
Q

Where does the last 10-30 deg of full BL shoulder ROM come from?

A

the T spine

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42
Q

With UL shoulder ROM where does the last 10-30 deg of ROM come from?

A

thoracic rotation or side bending

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43
Q

What is required for full ROM at GH joint?

A

the scapulothorasic joint

44
Q

Name the static stabilizers of the GH joint?

A

Labrum, Joint capsule, the ligament complex’s

45
Q

how big is the glenoid fossa?

A

about 1/4 the size of the humeral head

46
Q

What shape is the glenoid fossa?

A

pear shaped

47
Q

What does the labrum do?

A

it deepens the socket

48
Q

How much does the labrum deepen the socket?

A

50-75%

49
Q

What is the orientation of glenoid fossa with arm at side?

A

LAT, ANT and SUP.

50
Q

Angle of inclination changes with?

A

position of scapula

51
Q

What is the shoulder Joint capsule

A

a static stabilizer of the GH Joint.

52
Q

Which part of the shoulder joint capsule is thicker?

A

The ANT and INF capsule

53
Q

Name the ligament’s of the ligament complex of the shoulder joints

A

SGHL & MGHL & the IGHL (post and ant band)

54
Q

What is the main static stabilizer of the GH joint @ 90 deg ABDUCTION?

A

IGHL

55
Q

What is the primary restraint against INF translation of humorous in adducted position?

A

SGHL

56
Q

Where does the SGHL attach?

A

Glenoid to humorous.

57
Q

Primary restraint against ER when arm is at 45 deg of abduction & Scaption

A

MGHL

58
Q

What does the SGHL limit?

A

INF translation of humorous in adducted position. (but not at 45 deg or greater)

59
Q

What does the MGHL limit?

A

ER when arm is at 45 deg of abduction or scaption.

60
Q

What are the two components of the IGHL ?

A

ANT and POST band

61
Q

What becomes the primary restraint against ER @ 90 deg or greater of abduction/scaption.

A

Ant band of IGHL

62
Q

What does the ANT band of IGHL limit

A

restraint against ER @ 90 deg or greater of abduction/scaption.

63
Q

What it becomes the primary restraint against IR @ 90 deg or greater of abduction/scaption ?

A

Post band of IGHL

64
Q

What does the Post band of the IGHL limit?

A

restraint against IR @ 90 deg or greater of abduction/scaption ?

65
Q

What prevents INF translation of the humerus when you are IR?

A

ANT band of IGHL

66
Q

What prevents POST translation of the humerus when you are IR?

A

POST band of IGHL

67
Q

What prevents ANT translation of the humerus when you are ER?

A

ANT band of the IGHL

68
Q

What prevents INF translation of the humerus when you are ER?

A

POST band of IGHL

69
Q

What attaches to the SUP part of the labrum?

A

The Biceps tendon, SGHL and MGHL

70
Q

Name the rotator cuff muscles

A

Supraspinatus, Subscapularis, infraspinatus, teres Minor. (long head of biceps plays a role)

71
Q

What is primary role of rotator cuff muscle?

A

To stabilize humerus into the glenoid fossa

72
Q

What is the Primary #1 and #2 restraint against ER of ARM at 0 deg abd?

A

Subscapularis then SGHL

73
Q

What is the #1 and #2 restraint against ER of ARM at 45 deg abd?

A

SGHL & MGHL

74
Q

What is the Primary restraint against ER of ARM at 90 deg abd?

A

Anterior band of IGHLC

75
Q

What is the Primary restraint against IR of ARM at 0 deg abd?

A

Posterior band of IGHLC

76
Q

What is the Primary restraint against IR of ARM at 45 deg abd?

A

Ant & post band of IGHLC

77
Q

What is the Primary restraint against IR of ARM at 90 deg abd?

A

Ant & Post band of IGHLC

78
Q

What is the Primary restraint against INF translation of humerus at 0 deg abd?

A

SGHL & Coracohumeral lig

79
Q

What is the Primary restraint against INF translation of humerus at 90 deg abd?

A

IGHLC

80
Q

GH joint accessory motion? at open and closed pack

A

Open packed: 55 deg abd and 30 deg FLX

Closed packed: End range ABD & ER

81
Q

What are the dynamic stabilizers of the GH joint?

A

Rotator cuff muscles, deltoids, Pec & latissimus

82
Q

What pulls head of humorus into the glenoid fossa?

A

Rotator cuff muscles do

83
Q

What muscle plays a large role in stabilizing component of the humerus?

A

Deltoid muscle

84
Q

What is the primary function of the deltoid muscle

A

to swing the humerus

85
Q

is irritation and tendonitis is typically isolated to what tendon?

A

usually multiple tendons.

86
Q

How does the rotator cuff muscle create stability ?

A

it pulls on capsule which then pulls on ligaments and creates stability & vise versa

87
Q

How does the GH joint move in the capsule?

A

Humeral head will glide away from tightest portion of the capsule

88
Q

The GH joint always roles and glides in the opposite directions (convex-concave rule)

A

False not always

89
Q

Does GH joint have same principles of rolling and gliding as other joints?

A

NOPE

90
Q

Where does the humeral head stay throughout motion in the glenoid fossa?

A

it stays centered.

91
Q

From 0-30 deg of ARM FLX where does humorous move, then what from 30-90

A

0-30= ANT and SUP

30-90= POST and INF

92
Q

What SC joint pathology is worse?

A

Post dislocation

93
Q

Whats more common an SC joint or AC joint injury ?

A

AC joint

94
Q

Whats more common SC joint injury or clavicle fracture?

A

clavicle fracture

95
Q

How does SC joint injury occur

A

direct trauma (not common)

96
Q

What is another name for separated shoulder?

A

AC joint sprain

97
Q

What injury can happen if you fall on tip of acromion ?

A

AC joint sprain

98
Q

What grade AC joint sprain can be managed non-surgically?

A

1-3

99
Q

What injury is a slight tear to AC lig, and no damage to the trapezoid or conoid lig?

A

grade 1 AC sprain

100
Q

What injury is a fully torn AC lig, and slight damage or stretch to the trapezoid or conoid lig?

A

Grade 2 AC sprain

101
Q

What injury is a fully torn AC lig, and trapezoid or conoid lig?

A

Grade 3 AC sprain

102
Q

what is a grade 1 AC sprain?

A

a slight tear to AC lig, and no damage to the trapezoid or conoid lig

103
Q

what is a Grade 2 AC sprain ?

A

fully torn AC lig, and slight damage or stretch to the trapezoid or conoid lig

104
Q

what is a Grade 3 AC sprain ?

A

a fully torn AC lig, and trapezoid or conoid lig

105
Q

Grade 4-6 AC sprain is?

A

dependent on how much displacement or direction of displacement.

106
Q

What is Shoulder impingement?

A

bursa or tendons impinging on the subacromial space

107
Q

What causes shoulder impingement?

A

Rotator cuff dysfunction ( no activation or a tear)

Scapular positioning

Shape of acromion (small)

GH joint mobility deficits.

*** can be more than one cause.

ANATOMY 2! (9 decks)

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