Shoulder Intro Flashcards
What are the other jts of the shoulder girdle other than the GH j (6)
- Suprahumeral jt (psuedo)
- Acromio-clavicular jt
- Scapula-costal jt
- Sterno-clavicular jt
- Costo sternal jt
- Costovertebral jt
what % does the glenoid labrum increase the glenoid cavity sup/inf + ant post
sup/inf- +75%
Ant/post- +50%
Where is the bicep tendon in relation to capsul and synovial shieth
Bicep tendon is intra capsular but extra synovial
Where does the capsul of the GH jt attach
arrises from glenoid fossa and inserts around anatomical neck of humerus opposite of attachment of pec maj
What GH lig must fail for an ant dislocation to take place
Inferior GH lig
What ligament not part of GH limits ext rotation, important in adhesive capsulitis and forms tunnel for tendon of long head of bicepps
Coraco humeral lig
What ligament is the primary stabalizer of the abducted shoulder (to 90 degrees)
Inf glenohumeral lig
What are the parts of the inferior glenohumeral lig
has ant and post bands with an axillary pouch
What part of of the inferior glenohumeral lig is the site of bankart lesios
ant sup portion
What is the attachment points of the anterior band of the inf glenohumeral lig
Anterior band runs from the anterior humeral head below the lesser tuberosity to the upper half of the glenoid labrum.
What are the 3 ligs on the ant portion of the shoulder
sup
midd
inf gh ligs
What are the 3 bursae of the shoudler
Subdeltoid
Subacromial
subcoracoid
What are the 2 ligs that connects clavical to scapula and prevents rotation on eachother (what rot do each limit)
- Trapezoid (lat)- limits back rot of the clavicle
- Conoid (med)- limits forward rot of clacicle
(together called coracoclavicular)
What needs to break for a full dislocation of AC jt
Coracoclavicular + sup AC ligs severed
what are the 3 ligs supporting the SC jt
- Ant/post sc lig
- Inter clavicular lig
- Costoclavicular lig
What makes up the costovertebral jt.
- head of rib to vert
2. Costotransverse- costal tubercle with transverse process
What are the 2 psuedo jts of the shoulder
- Scapulo thoracic jt
2. suprahumeral space
What happens in the 2nd phase of scapulo humeral rhythm (humerus, clavicle, ac jt, sc jt)
Humerus- abducted 30
Clavical- elevated 12-15 degrees no rot
Ac jt- increase of 10 degrees
What happens in the 3rd pahse of scapulo humeral rythem (humerus/Scap throacic, clavicle, sc jt)
Humerus- to 90 (60 GH, 30 ST)
Clavical- to 30 no rot
sc- no change
what happens in the 4th phase of scapulo hueral rhythem (humerus/Scap throacic, clavicle,)
full 180- (120 humeral, 60 scapular)
clavical rotates for this extra movement at scapulo clavical angle
what are the 4 mm of the rotator cuff
- Infraspinatus
- supraspinatus
- teres minor
- subscapularis
what are the downward rotators of the scapula (3)
lev scap
rhomboid minor
rhomboid major
What are the upward rotators of the scapula (3)
upper traps
Lower traps depress med border
serratus ant pulls lower prtion of scap for
what would ant capsul tightness result in
- Posterior humeral subluxation
2. Posterior glenoid wear
