shoulder ligaments and joints
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Scapulothoracic | Formed by the relevant bones &
the muscles that attach to both
scapula & thoracic skeleton
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| Sternoclavicular | Checks med. clavicular dislocation, Serves as a pivot point for SC motion, "Base of Operation" joining the UE to axial skeleton, while contributing to mobility & withstanding
imposed stresses
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| Acromioclavicular | maintain the relation b/n clavicle & scapula
in the early stages of elevation of the UE & to allow the scapula additional range of
rotation on the thorax in the
latter stages of limb elevation
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| Glenohumeral | Closed packed position: ABd & ER, Capsule fibers twists & tightens
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| Scapular winging | occurs as scapula moves around thoracic cage about a vertical axis (ABd / protraction)
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| Tipping | must occur for the scapula to maintain contact w/rib cage during elevation or depression of scapula
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| Ant & Post Sternoclavicular lig. | Anterior checks ant. mov’t of medial clavicle, Posterior checks post. mov’t, assist in preventing upward displacement of
medial clavicle
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| Costoclavicular (rhomboid) lig. | main check for elevation of lateral clavicle &
superior glide of medial clavicle during elevation
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| Interclavicular lig. | checks inferior glide, lateral displacement &
depression of clavicle (protects vital structures)
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| Acromioclavicular lig. | fairly weak; strengthens capsule superiorly
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| Coracoclavicular lig. | Prevents superior dislocation & check depression & downward
rotation of scapula
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| Coracohumeral lig. | may prevent inferior subluxation of humeral head and limits ER in 0-60° of ABduction
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| Transverse Humeral lig. | Converts groove into a canal for biceps L.H. Holds biceps L.H. tendon & sheath in place
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| Glenohumeral lig. | stretched in anatomical position, prevents subluxation of humeral head in this position,stabilizes jt anteriorly, limits ER & anterior translation when arm b/n 0-90°
of ABd.,most important static restraint
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