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What action can easily damage the long thoracic N?
overhead actions
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What is supraspinatus impingement?
When the supraspinatus muscle becomes compressed by the acromion of the scapula
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What is characteristic of type II supraspinatus impingement?
- curve in acromion, leaves small space for supraspinatus muscle to go to its insertion
- tendon can wear out more quickly
- rotator tear
- compresses not only the muscle but blood supply and nerves
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What is characteristic of type III supraspinatus impingement?
- hook in acromion of scapula
- compression of muscle
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What are the rotator cuff muscles?
- Tendonous structure holding the shoulder in place; tendons of the following muscles:
- supraspinatus m.
- infraspinatus m.
- teres major m.
- subscapularis m.
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Dynamic stability of glenocavity joint:
- humeral head remains in glenoid cavity during movements
- the rotator cuff mm. allow this
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When an elderly person has a rotator cuff injury, they most likely injuried which muscle?
supraspinatus m.
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What is the only component of the rotator cuff that passes anterior to glenoid-humeral joint?
subscapularis m.
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When a young athlete has a rotator cuff injury, they most likely injuried which muscle?
subscapularis m.
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What are the boundaries of the quadrangular space?
- superior border
- lateral border
- inferior border
- medial border
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What is the superior border of the quadrangular space?
lateral border of scapula and capsule of shoulder joint
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What is the lateral border of the quadrangular space?
surgical neck of humerus
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What is the inferior border of the quadrangular space?
teres major m.
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What is the medial border of the quadrangular space?
long head of triceps brachii m.
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What is contained in the quadrangular space?
- axillary N
- Posterior humeral circumflex A and V
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What does the axillary nerve innervate?
teres minor and deltoid
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Which two arteries arise in the neck?
- transverse cervical
- suprascapular
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Which trunk is the transverse cervical artery a branch of?
thyrocervical trunk
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What does the transverse cervical artery supply?
levator scapulae, trapezius, and rhomboidei mm.
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Which trunk is the suprascapular artery a branch of?
thyrocervical trunk
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What does the suprascapular A supply?
supraspinatus and infraspinatus
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Which arteries does the suprascapular A anastomoses with?
- deep branch of transverse cervical a.
- circumflex scapular branch of subscapular a.
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What arteries arise in the axilla?
- deltoid branch of thoracoacromial trunk
- lateral thoracic A
- subscapular A
- posterior humeral circumflex A
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What does the deltoid branch of the thoracoaromial truck supply?
deltoid m.
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What does th lateral thoracic A. supply?
serratus anterior m.
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What are the branches of the subscapular A?
- thoracodorsal a.
- circumflex scapular a.
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What does the thoracodorsal a. supply?
subscapularis, teres major, latissimus dorsi, and serratus anterior mm.
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What does the circumflex scapular a. supply?
infraspinatus m.
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Which artery does the circumflex scapular a. anastomoses with?
suprascapular a.
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What does the posterior humeral circumflex a. supply?
deltoid m.
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Which artery does the posterior humeral circumflex a. anastomoses with?
anterior humeral circumflex a.
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Deep lymphatic vessels of the shoulder follow the blood vessels, and therefore, drain largely into:
the axillary lymph nodes
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