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Details

Shoulder
Principle learning objectives
19
Anatomy
Graduate
10/21/2009

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Cards

Term
Where is the acromion located?
Definition
Most anterior portion of the scapula; articulates with the clavicle
Term
What is a grade I shoulder separation?
Definition
minor tears in the capsule of the acromioclavicular (AC)joint; spacing of AC joint and coracoclavicular is unchanged
Term
What is a grade II shoulder separation?
Definition
a partial subluxation of the AC joint (wider space; coracoclavicular remains the same
Term
What is a grade III separation?
Definition
tears in each of the AC and coracoclavicular; both spaces are widened
Term
What does the head of the humerus articulate with?
Definition
the glenoid cavity of the scapula; glenoid labrum
Term
What is the major nerve of the upper limb?
Definition
axillary nerve
Term
What injury can injure the axillary nerve?
Definition
anterior shoulder dislocations; fractures of the surgical neck of the humerus
Term
What nerve innervates the trap?
Definition
Accessory nerve (CN XI)
Term
What is the function of the trapezius?
Definition
prime mover for raising the shoulder; one of the two prime movers for lateral rotation of the scapula
Term
What are the muscles of the rotator cuff
Definition
SITS (supraspinatus, infraspinatus, teres minor, and subscapularis)
Term
Which nerve innervates serratus anterior?
Definition
long thoracic nerve
Term
What does serratus anterior do?
Definition
prime mover in protraction (forward) of the shoulder; one of two prime movers (w/ trapezius) for lateral rotation
Term
What does supraspinatus do?
Definition
abducts the arm at the shoulder joint from 0 to 10 degrees
Term
What innervates the supraspinatus?
Definition
the suprascapular nerve
Term
Where do the nerve fibers come from that innervate the supraspinatus?
Definition
C5 and C6
Term
What innervates the deltoid?
Definition
axillary nerve
Term
What does the deltoid do?
Definition
prime mover of the abduction of the arm at the shoulder joint from greater than 10 degrees
Term
What supplies the nerve fibers that innervate the deltoid
Definition
C5 and C6
Term
Which nerve fibers mainly control abduction of the arm at the shoulder joint?
Definition
C5 (supraspinatus and deltoid receive more innervation from C5 than C6)
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