Shoulder Joint Flashcards
function of shoulder
position the UE (hand) for function
shoulder is more dependent on ________ than on ________ for integrity
muscle;
joint structures;
mobility to permit UE function but at a cost
most likely joint of UE to dislocate
scapulothoracic joint is not a true anatomical joint because
there is no fibrous union
no capsule
it is still considered a joint tho
supra-acromial
coracoacromial arch & the head of the humerus
movement of the Scapulothroacic joint is associated with movement of ______ & ________
Acromioclavicular & sternoclavicular
common lever of the shoulder
clavicle
scapulothoracic joint
- is not a true anatomical joint
- associated with acromioclavicular & sternoclavicular
common link of the scapothoracic joint
clavicle
functions of the scapulothoracic joint
- maintain optimal position of glenoid fossa
- incr functional ROM of upper extremity
- provides a stable base for upper extremity function
scapulothoracic joint primary motions
elevation/depression – translatory
(this is an up & down motion – i.e. shrug shoulders)
abduction/adduction (protraction/retraction) – translatory
upward/downward mobility – rotary
scapulothoracic joint secondary motions
tipping & winging
winging (scapulothoracic secondary motion)
rotation about vertical axis (vertebral axis comes away)
caused by weak serratus anterior
tipping (scapulothoracic secondary motion)
rotation about medial-lateral axis
scapulothoracic joint – function of secondary motion
maintain proximity of scapula on thorax
stabilization of scapulothoracic joint
muscles & atmospheric pressure
when you have _____ movement there will be _____ movement
scapula;
clavical
and vice versa
structural attachment between the axial & appendicular skeleton
sternoclavicular joint
anterior & posterior sternoclavicular ligaments check:
anterior & posterior motion of clavicle
costoclavicular ligament
primary stabilizer
- site of AOR for elevation/depression & protraction/retraction
- checks elevation & superior glide of clavicle
- movement is limited upward
interclavicular ligament checks
checks depression & downward glide
sternoclavicular elevation ROM
45 deg
sternoclavicular depression ROM
15 deg
sternoclavicular protraction ROM
15 deg