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Clinical Anatomy 2 > shoulder complex > Flashcards

shoulder complex Flashcards

(63 cards)

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1
Q

what are the trapezoid attachments

A

coracoid process to trapezoid line of clavicle

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2
Q

what are the conoid attachments

A

coracoid process to conoid tubercule of clavicle

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3
Q

what is the function of the coracoclavicular ligament

A

stabilizes AC joint

-limits medial displacement, protraction, elevation

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4
Q

what is the function of the acromioclavicular ligament

A

stabilizes AC joint

-limits superior migration of clavicle

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5
Q

what are the attachments of the acromioclavicular ligament

A

superior aspect acromial end of clavicle to adjacent acromion

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6
Q

what are the attachments of the coracoacrominal lig

A

lateral border coracoid process

acromion adjacent to clavicular articulation

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7
Q

what is the function of the coracoacrominal lig

A

prevents superior displacement of humeral head by forming the coracoacromial arch

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8
Q

what is the function of the coracohumeral lig

A

reinforces superoanterior aspects of joint capsule

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9
Q

what are the attachments of the coracohumeral lig

A

base of coracoid process

anterior aspect greater tubercule

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10
Q

what are the attachments of the costoclavicular lig

A

superior aspect of cartilage of first rib

undersurface of clavicle

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11
Q

what is the function of the costclav ligament

A

stabilizes SC joint

limits elevation of clavicle

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12
Q

what is the function of the superior transverse scapular lig

A

closes off suprascapular notch

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13
Q

what are the attachments of the superior transverse scapular lig

A

base of coracoid process

medial edge scap notch

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14
Q

what are the attachments of the glenoid capsule

A

circumference glenoid cavity to anatomical neck of humerus

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15
Q

what is the function of the superior GH lig

A

stabilizes against inferior translation of humerus on the glenoid with humerus at 0 degrees abduction

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16
Q

what is the function of the middle GH lig

A

stabilizies against anterior translation of humerus on glenoid

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17
Q

what is the function of the inferior GH lig

A

stabilizes against inferior translation of humerus on glenoic with humerus at 90 degrees abduction

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18
Q

what are the attachments of the GH ligaments

A

upper part medial margin of glenoid cavity
lesster tubercule
anatomical neck

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19
Q

which joints are synovial

A

all EXCEPT scapulothoracic

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20
Q

describe the joint surfaces at the SC joint

A
  1. clavicle is convex superior inferior
  2. manubrium concave superior inferior
  3. clavicle concave ant-pot
  4. manubrium convex ant-post
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21
Q

what are the ligaments of the SC joint

A

SC lig: ant and post
costcoclav lig
interclavicular lig

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22
Q

when is the costcoclav lig taught

A

with elevation and retraction

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23
Q

what kind of joint is the SC joint

A

saddle

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24
Q

what happens with protraction at the SC joint

A

anterior roll and glide of concave clavicle

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25
what happens with retraction at the SC joint
posterior roll and glide
26
what happens with elevation at the SC joint
superior roll and inferior glide of convex clavicle
27
what happens with depression at the SC joint
inferior roll and superior glide
28
Discuss SC joint dislocation
- very rare - direct trauma or blow to clavicle or FOOSH - MUCH more common to break clavicle - posterior type holds higher risk of injury to other structures - post=surgery
29
what kind of joint is the AC joint
plane (gliding)
30
which ligaments are in the AC joint
- acromioclavicular | - coracoclav: trapezoid and conoid
31
describe movements at the AC joint with shoudler girdle motion
1. protraction-retraction of scap= AP glide | 2. adbuction-adduction of scap= rotation of acromion on clavicle
32
what is a separated shoulder
AC joint sprain - fall on acromion - progressive disruption of ligaments: AC joint, trapezoid, conoid - then graded by displacement - grades 1-3 can be managed nonsurgically - grades 4-6 surgery
33
what kind of joint is the scapulothoracic joint
pseudo
34
talk about the scapulothoracic joitn
- muscular joint betwen scapula and trunk - required for full ROM at GH joint - no direct ligament attachment
35
what are the 3 rotations at the scapulothoracic joint
1. upward/downward 2. IR/ER 3. ant/post tilt
36
what are the 3 purposes of scapulohumeral rhythm
1. allows for greater shoulder ROM 2. maintains optimal contact between humeral head and glenoid fossa 3. assists with maintaing an optimal length-tension relationship of GH muscles
37
Describe the role of the T spine with bilateral shoulder motion
10-30 degrees thoracic extension with full shoulder elevation
38
Describe the role of the T spine with unilateral shoulder motion
10-30 degrees thoracic rot/sidebend
39
what kind of joint is the GH
ball and socket | largets ROM and movement in body
40
why is the GH the largets ROm and movement
- shallow joint - extensive joint capsule - limited ligamentous support
41
talk about the labrum
- static stabilizer - glenoid fossa 1/4 size humeral head - glenoid fossa without cartilage is more flat than concave - concavity arises primarily due to labrum and to a less er extent from catilage - glenoid shallow socket faces lateral, anterior and superior - angle of inclination changes with position of scap - labrum deepens socket 50-75%
42
talk about the joint capsule
- static stabilizer | - anterior and inferior thicker
43
what are the anterior GH ligaments and inferior pliable redundent ligamentous complex
static stabilizers
44
what does the superior glenohumeral lig resist
inferior translation in adducted position
45
what does the middle glenohumeral lig resist
ER at 45 degrees abduction/scaption -courses along anterior joint from glenoid to humerus in superior inferior direction
46
talk about the inferior glenohumeral ligament
main static stabilizer of the GH joint with arm at 90 degrees abducrtion
47
what does hte anterior band inferior GH ligament resist
ER at 90 degrees abduction/scaption
48
what resists ER at 0 degrees abduction
- subscapularis 1st | - SGHL
49
what resists ER at 45 degrees abduction
- SGHL | - MGHL
50
what resists ER at 90 degrees abduction
anterior band IGHLC
51
what resists IR at 0 degrees abduction
posterior band IGHLC
52
what resists IR at 45 degrees abduction
anterior and posterior IGHLC
53
what resists IR at 90 degrees abduction
anterior and posteior band IGHLC
54
what resists inferior translation at 0 degrees abduction
SGHL | coracohumeral lig
55
what resists inferior translation at 90 degrees abduction
IGHLC
56
what is a loose/open packed position for the GH joint
55 degrees abduction | 30 degrees horizontal adduction
57
what is a close packed position
end range abduction and ER
58
what is the ER convex-concave rule
roll posterior | glide anterior
59
what is the IR convex-concave rule
roll anterior | glide posterior
60
what is the flexion convex-concave rule
roll superior | glide inferior
61
what does the rotator cuff do
pulls head of humerus into glenoid fossa
62
what does the deltoid do
- large stabilizing component, regardless of humeral position - primary function to swing humerus
63
what is subacromial impingement
-RTC tendon and/or LHB may get repeadetdly compressed, along with bursa potential causes: 1. RTC dysfunction 2. scapular positioning 3. shape of acromion 4. GH joint mobility deficit or hypermobility

Clinical Anatomy 2 (11 decks)

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