SITS - Rotator Cuff Muscles Flashcards

1
Q

Supraspinatus

A

PA:
+ supraspinous fossa of scapula

DA:
+ superior facet of the greater tubercle of the humerus

N:
+ suprascapular nerve (C4, C5*, C6)

A:
+ initiates and assists deltoid in shoulder abduction, acts with other rotator cuffs

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2
Q

Infraspinatus

A

PA:
+ infraspinous fossa of scapula

DA:
+ middle facet of greater tubercle of the humerus

N:
+ suprascapular nerve (C5*, C6)

A:
+ laterally rotate shoulder joint
+ helps hold humeral head in glenoid cavity of the scapula

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3
Q

Subscapularis

A

PA:
+ subscapular fossa (most of anterior surface of scapula)

DA:
+ lesser tubercle of the humerus

N:
+ upper and lower subscapular nerves (C5, C6*, C7)

A:
+ medially rotates the shoulder joint
+ adducts the shoulder joint
+ helps hold humeral head in glenoid cavity

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4
Q

Teres minor

A

PA:
+ middle part of lateral border of scapula

DA:
+ inferior facet of greater tubercle of the humerus

N:
+ axillary nerve (C5*, C6)

A:
+ laterally rotate shoulder joint
+ helps hold humeral head in glenoid cavity of the scapula

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