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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
What type of joint is the GH (glenohumoral) Joint?
Synovial
26
What type of stabilizers does the GH have?
Dynamic & Static
27
What joint has the largest ROM in the body?
GH (glenohumeral) shoulder joint.
28
Why does the GH joint have GREAT ROM?
1) shallow joint 2) extensive joint capsule 3) limited ligamentous support
29
Name the morphology of the clavicle ?
CONVEX: SUP to INF CONCAVE: ANT to SUP
30
Name morphology of manubrium?
CONCAVE: SUP to INF CONVEX: ANT to POST
31
What roll and glide happen with protraction of shoulder at SC joint?
ANT ROLL & glide of clavicle
32
What roll and glide happen with retraction of shoulder at SC joint?
POST ROLL & glide of clavicle
33
What roll and glide happen with elevation of shoulder at SC joint?
SUP roll and INF glide of clavicle.
34
What roll and glide happen with depression of shoulder at SC joint?
INF roll and SUP glide of clavicle.
35
What kind of joint is the Scapulothoracic joint?
Pseudo Joint
36
What muscles are involved with the Scapulothoracic joint?
Subscapularis and serratus ant
37
What ligament attaches to the Scapulothoracic joint?
none, there is no direct ligament attachment
38
What does Scapulohumeral rhythm consist of ? (joints)
movement of GH, ST, AC & SC joints
39
What purpose does Scapulohumeral rhythm serve?
1) greater shoulder ROM 2) optimal contact between humeral head and the glenoid fossa 3) Assists in optimal length-tension relationship between glenohumeral muscles.
40
Where might scapular upward rotation be greater?
on non-dominate side
41
Where does the last 10-30 deg of full BL shoulder ROM come from?
the T spine
42
With UL shoulder ROM where does the last 10-30 deg of ROM come from?
thoracic rotation or side bending
43
What is required for full ROM at GH joint?
the scapulothorasic joint
44
Name the static stabilizers of the GH joint?
Labrum, Joint capsule, the ligament complex's
45
how big is the glenoid fossa?
about 1/4 the size of the humeral head
46
What shape is the glenoid fossa?
pear shaped
47
What does the labrum do?
it deepens the socket
48
How much does the labrum deepen the socket?
50-75%
49
What is the orientation of glenoid fossa with arm at side?
LAT, ANT and SUP.
50
Angle of inclination changes with?
position of scapula
51
What is the shoulder Joint capsule
a static stabilizer of the GH Joint.
52
Which part of the shoulder joint capsule is thicker?
The ANT and INF capsule
53
Name the ligament's of the ligament complex of the shoulder joints
SGHL & MGHL & the IGHL (post and ant band)
54
What is the main static stabilizer of the GH joint @ 90 deg ABDUCTION?
IGHL
55
What is the primary restraint against INF translation of humorous in adducted position?
SGHL
56
Where does the SGHL attach?
Glenoid to humorous.
57
Primary restraint against ER when arm is at 45 deg of abduction & Scaption
MGHL
58
What does the SGHL limit?
INF translation of humorous in adducted position. (but not at 45 deg or greater)
59
What does the MGHL limit?
ER when arm is at 45 deg of abduction or scaption.
60
What are the two components of the IGHL ?
ANT and POST band
61
What becomes the primary restraint against ER @ 90 deg or greater of abduction/scaption.
Ant band of IGHL
62
What does the ANT band of IGHL limit
restraint against ER @ 90 deg or greater of abduction/scaption.
63
What it becomes the primary restraint against IR @ 90 deg or greater of abduction/scaption ?
Post band of IGHL
64
What does the Post band of the IGHL limit?
restraint against IR @ 90 deg or greater of abduction/scaption ?
65
What prevents INF translation of the humerus when you are IR?
ANT band of IGHL
66
What prevents POST translation of the humerus when you are IR?
POST band of IGHL
67
What prevents ANT translation of the humerus when you are ER?
ANT band of the IGHL
68
What prevents INF translation of the humerus when you are ER?
POST band of IGHL
69
What attaches to the SUP part of the labrum?
The Biceps tendon, SGHL and MGHL
70
Name the rotator cuff muscles
Supraspinatus, Subscapularis, infraspinatus, teres Minor. (long head of biceps plays a role)
71
What is primary role of rotator cuff muscle?
To stabilize humerus into the glenoid fossa
72
What is the Primary #1 and #2 restraint against ER of ARM at 0 deg abd?
Subscapularis then SGHL
73
What is the #1 and #2 restraint against ER of ARM at 45 deg abd?
SGHL & MGHL
74
What is the Primary restraint against ER of ARM at 90 deg abd?
Anterior band of IGHLC
75
What is the Primary restraint against IR of ARM at 0 deg abd?
Posterior band of IGHLC
76
What is the Primary restraint against IR of ARM at 45 deg abd?
Ant & post band of IGHLC
77
What is the Primary restraint against IR of ARM at 90 deg abd?
Ant & Post band of IGHLC
78
What is the Primary restraint against INF translation of humerus at 0 deg abd?
SGHL & Coracohumeral lig
79
What is the Primary restraint against INF translation of humerus at 90 deg abd?
IGHLC
80
GH joint accessory motion? at open and closed pack
Open packed: 55 deg abd and 30 deg FLX Closed packed: End range ABD & ER
81
What are the dynamic stabilizers of the GH joint?
Rotator cuff muscles, deltoids, Pec & latissimus
82
What pulls head of humorus into the glenoid fossa?
Rotator cuff muscles do
83
What muscle plays a large role in stabilizing component of the humerus?
Deltoid muscle
84
What is the primary function of the deltoid muscle
to swing the humerus
85
is irritation and tendonitis is typically isolated to what tendon?
usually multiple tendons.
86
How does the rotator cuff muscle create stability ?
it pulls on capsule which then pulls on ligaments and creates stability & vise versa
87
How does the GH joint move in the capsule?
Humeral head will glide away from tightest portion of the capsule
88
The GH joint always roles and glides in the opposite directions (convex-concave rule)
False not always
89
Does GH joint have same principles of rolling and gliding as other joints?
NOPE
90
Where does the humeral head stay throughout motion in the glenoid fossa?
it stays centered.
91
From 0-30 deg of ARM FLX where does humorous move, then what from 30-90
0-30= ANT and SUP 30-90= POST and INF
92
What SC joint pathology is worse?
Post dislocation
93
Whats more common an SC joint or AC joint injury ?
AC joint
94
Whats more common SC joint injury or clavicle fracture?
clavicle fracture
95
How does SC joint injury occur
direct trauma (not common)
96
What is another name for separated shoulder?
AC joint sprain
97
What injury can happen if you fall on tip of acromion ?
AC joint sprain
98
What grade AC joint sprain can be managed non-surgically?
1-3
99
What injury is a slight tear to AC lig, and no damage to the trapezoid or conoid lig?
grade 1 AC sprain
100
What injury is a fully torn AC lig, and slight damage or stretch to the trapezoid or conoid lig?
Grade 2 AC sprain
101
What injury is a fully torn AC lig, and trapezoid or conoid lig?
Grade 3 AC sprain
102
what is a grade 1 AC sprain?
a slight tear to AC lig, and no damage to the trapezoid or conoid lig
103
what is a Grade 2 AC sprain ?
fully torn AC lig, and slight damage or stretch to the trapezoid or conoid lig
104
what is a Grade 3 AC sprain ?
a fully torn AC lig, and trapezoid or conoid lig
105
Grade 4-6 AC sprain is?
dependent on how much displacement or direction of displacement.
106
What is Shoulder impingement?
bursa or tendons impinging on the subacromial space
107
What causes shoulder impingement?
Rotator cuff dysfunction ( no activation or a tear) Scapular positioning Shape of acromion (small) GH joint mobility deficits. *** can be more than one cause.

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