Term
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Definition
Origin: Lateral 1/3 of clavicle
Insertion: Deltoid tuberosity of humerus
Innervation: Axillary N.
Ant. Flxes and medially rotates arem
Middle: Abducts arm
Pos. Extends and laterally rotates arm |
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Term
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Definition
Origin: Supraspinatous fossa of scapula
Insertion: Greater tubercle of humerus (Superior facet)
Innervation: Suprascapular N.
Action: Initiates abduction (first 15 degrees) by assisting with deltoid |
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Term
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Definition
Origin: Infraspinatous fossa of scapula
Insertion: Greater tubercle of humerus (middle facet)
Innervation: Suprascapular N.
Action:Laterally rotates arm |
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Term
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Definition
Origin: Posterior surface of inferior angle of scapula
Insertion: Intertubercular sulcus of humerus
Innervation: Lower Subscapula N.
Action: Adducts and medially rotates |
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Term
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Definition
Origin: Middle part of lateral border of scapula
Insertion: Greater tubercle of humerus (Inferior facet)
Innervation: Axillary N.
Action: Laterally rotates |
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Term
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Definition
| Origin: Subscapular fossa Insertion:Lesser tubercle of humerus Innervation: Upper and lower subscapular N. Action: Medially rotates arm; holds head of humerus in glenoid cavity Action: |
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Term
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Definition
-Supraspinatus
-Infraspinatus
-Teres minor
-Subscapularis |
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