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28 Cards in this Set
- Front
- Back
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Deltoid attach
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Origin: Lateral 1/3 of clavicle, acromion, spine of scapula
Insert: Deltoid tuberosity of humerous |
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deltoid function
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Abduct, flexes, extends, and rotates
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Deltoid blood supply
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Deltoid branch of thoracoacromial artery
Posterior humeral circumflex |
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deltoid Innervation
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Axillary nerve
Damage will cause atrophy of deltoid |
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teres Major attach
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Origin: Posterior surface of inferior angle of scapula
Insert: Medial lip of intertubercular groove |
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Teres Major function
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Medially rotates humerous, adducts and extends
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Teres major Blood Supply
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Circumflex scapular artery
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Teres Major Innervation
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Lower subscapular nerve
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rotator Cuff muscles?
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supraspinatus, infraspinatus, teres minor, subscapularis
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supraspinatus attach
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Origin: supraspinous fossa
Insert: Greater tubercle of humerous |
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supraspinatus function
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Initiates abduction (critical for first 15 degrees)
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supraspinatus blood supply
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Suprascapular artery
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supraspinatus innervation
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Suprascapular nerve
Denervation of the supraspinatus muscle would manifest as weakness or inability to initiate abduction from the fully adducted position. |
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Infraspinatus attach
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Origin: infraspinous fossa
Insert: middle facet of greater tubercle |
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infraspinatus function
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Laterally rotates humerous
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infraspinatus blood supply
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Suprascapular artery and scapular circumflex artery
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infraspinatus innervation
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suprascapular nerve
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teres minor attach
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Origin: superior part of lateral border of scapula
Insert: inferior facet of greater tubercle |
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teres minor function
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Laterally rotates the humerous
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teres minor blood supply
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Scapular circumflex
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teres minor innervation
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Axillary nerve (as it passes through quadrangular space)
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subscapularis attach
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Origin: subscapular fossa
Insert: Lesser tubercle of humerous |
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subscapularis function
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Medially rotates the humerous
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subscapularis blood supply
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Subscapular artery
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subscapularis innervation
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Upper and lower subscapular nerves
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biceps Brachii attach
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Origin: (short head) tip of coracoid process
(long head) supraglenoid tubercle of scapula Insert |
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biceps brachii function
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Stabilizes anterior aspect of the shoulder
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biceps brachii innervation
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Musclulocutaneous nerve
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