sc, ac, shoulder, elbow and radioulnar Flashcards
what kind of joint is the SC joint
synovial modified saddle
what ligaments make up the SC joint
3 of them
- ant and post sternoclavicular
- costoclavicular
- interclavicular
what movements occur at SC joint
passively moves w/ scap
-does opp of what scap does
innervation and blood supply to the SC joint
nerve: subclavius but mostly suprascap
blood: suprascap and internal thoracic
what kidn of joint is the AC joint
synovial planar joint
what ligaments make up the AC joint
- acromioclavicular
- coracoclavicular (conoid and trapezoid)
what movements occur at the AC joint
- not much
- keep humerus suspended and support weight
nerve and blood supply to the AC joint
nerve: suprascap and lateral pectoral
blood: suprascapular and thoracoacromial
what is shoulder seperation?
what happens as a result?
- tearing of coracoclavicular or acromioclavicular ligs
- clavicle will override acromion
what type of joint is the gleohumeral joint
synovial ball and socket
what ligament attaches the coracoid process and acromion process?
what motion does it resist?
- coracoacromial
- prevent upward displacement/reiforce superior aspect of joint
what ligaments attaches croacoid process and humerus?
what motiion does it resist?
- coracohumeral
- excessive abduction/reinforce supeior aspect of shoulder
what ligaments holds the bicep tendon in place?
transverse humeral
what is the function of the glenohumeral ligament
strengthen anterior portion of capsule
what happens if the inferior aspect of the glenohumeral ligament is weak?
anterior glenohumeral instability
-key in stabilization
nerve and blood supply to the glenohumeral joint
nerve: -suprascapular -axillary -lateral pectoral -posterior cord of brachial plexus blood: -ant/post humeral circumflex -suprascapular
where and what are the functions of the openings in the shoulder capsule
3 of them
- btwn tubercels: allows long head of biceps to pass thru
- below coracoid process: communicate w/ subscarp bursa
- btwn joint and infraspinatus
where are the bursa in the shoulder joint
4 of them
- subscapular: btwn muscle and neck of scap
- subacromial/subdeltoid: superficial to supraspinatus
- btwn coracoid and capsule
- upper surface of acromion
what is the role of traps in stability of shouldre joint
- passive stability
- keep joint retracted in upward rotation
what is the role of the deltoid in shoulder stability
- passive
- prevent dislocation by gravity
what is the role of the ligaments in shoulder stability
- passive
- help stabilize
what is the role of the rotator cuff muscles in shoulder stability
- active
- weakness can cause impingement of structures
what ligaments are involved in the elbow joint?
2 of them
- radial/lateral collateral
- ulnar/medial collateral (ant, post, oblique)
nerve and blood supply to elbow
nerve:
-musculocutaneous
-radial
-some ulnar, median, and ant inerosseous
blood:
-anastomosis of brachial to raidial and ulnar arteries
-collateral meet w/ recurrent arteries (radial and ulnar)
what bursa are located in elbow joint?
4 of them
- olecranon (subcutaneous and under tricep tendon)
- radioulnar
- interosseal
- bicepitoradial
what ligaments are invovled in proximal radioulnar joint
annular
nerve and blood supply at the proximal radioulnar joint
nerve:
- musculocutaneous
- median
- radial
blood: same as elbow
what is nursemaids elobw?
what does a partial and complete one look like?
- radius pulled out of annular lig
- partial: no rotation of arm
- complete: lump on arm
what happens for tommy john surgery?
- damage to ulnar collateral lig
- palmaris longus tendon “sewen” into joint
what is the main symptom of shoulder impingement
pain posterior and below acromion especially during abd/add and flexion
what tests can you perform for shoulder impingment
- painful arc: pain will be present from 60-120
- full can test vs empty can: pain during empty can = positive test
