A&P II - Shoulder MG 2
Terms
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- the four rotator cuff muscles encompass and stabilize the __ joint
- glenohumeral
- to locate the supraspinatus belly, you must palpate through which muscle?
- trapezius (upper)
- the only rotator cuff muscle not involved with the rotation of the shoulder is the __
- supraspinatus
- the dense quality of the infraspinatus is due to its
- thick layered fascia
- the subscapularus is sandwiched between which fossa and which muscle
- subscapular fossa - serratus anterior
- what is the best action to ask your partner to perform to feel the supraspinatus contract
- abduction of the shoulder
- what three bony landmarks can you lay your fingers along to isolate the belly of the infraspinatus
- spine of the scapula - medial border - lateral border
- if you follow the fibers of the infraspinatus laterally, they converge underneath which muscle
- deltoid
- you can distinguish the teres minor from the teres major by their sizes and actions. Explain
- Minor = Smaller, rotates shoulder medially - Major = larger, rotates shoulder laterally
- when accessing the subscapularis from a sidelying position, under which two muscles should you slide your thumb.
- latissimus dorsi - teres major
- what action can you ask your partner to do to gently contract the subscapularis
- medially rotate the shoulder
- to access the supraspinatus tendon, you need to sink your thumb tip though which muscle
- deltoid
- to locate the infraspinatus and teres minor tendons in a supine position, how would you position your partner's shoulder
- flex shoulder to 90 degrees, then horizontally adduct and laterally rotate the shoulder 10 degrees
- the subscapularis tendon can be located between the two tendons of which muscle
- biceps brachii
- in which two directions do you want to move from the coracoid process to locate the subscapularis tendon
- inferior and lateral
- Origin of Infraspinatus
- infraspinous fossa of the scapula
- Insertion of Infraspinatus
- greater tubercle of the humerus
- Origin of Subscapularis
- subscapular fossa of the scapula
- Insertion of Subscapularis
- lesser tubercle of the humerus
- Origin of Supraspinatus
- supraspinous fossa of the scapula
- Insertion of Supraspinatus
- greater tubercle of the humerus
- Origin of Teres Minor
- superior half of lateral border of the scapula
- Insertion of Teres Minor
- greater tubercle of the humerus