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South College Anatomy
Posterior Scapular Region Origin, Insertion, Innervation, Function
20
Anatomy
Graduate
10/06/2008

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Term
Supraspinatus Origin
Definition
Medial 2/3 of the Supraspinous fossa of the scapula and the deep fascia that covers the muscle
Term
Supraspinatus Insertion
Definition
Most superior facet on the greater tubercle of the humerus
Term
Supraspinatus Innervation
Definition
Superscapular Nerve C5-C6 (C5 is Major Innervator)
Term
Supraspinatus Function
Definition
Rotator Cuff Muscle, Initiation of Abduction of Arm to 15 degree at Gleno-humeral joint.
Term
Infraspinatus Origin
Definition
Medial 2/3 of infraspinus fossa of scapula and deep fascia that covers the muscle
Term
Infraspinatus Insertion
Definition
Middle facet of posterior surface of the greater tubercle of the humerus
Term
Infraspinatus Innervation
Definition
Suprascapular Nerve C5 C6 (C5 is Major Innervator)
Term
Infraspinatus Function
Definition
Rotator Cuff Muscle, Lateral Rotation of arm at gleno-humeral joint.
Term
Teres Minor Origin
Definition
Upper 2/3 of a flattened strip of bone on the posterior surface of the scapula immediatley adjacent to the lateral border of the scapula.
Term
Teres Minor Insertion
Definition
Inferior Facet on the posterior surface of the greater tubercle of the humerus
Term
Teres Minor Innervation
Definition
Axillary Nerve C5-C6 (C5 is Major Innervator)
Term
Teres Minor Function
Definition
Rotator Cuff Muscle, lateral rotation of arm at gleno-humeral joint.
Term
Teres Major Origin
Definition
Elongated Oval area on the posterior surface of the inferior angle of the scapula.
Term
Teres Major Insertion
Definition
Medial Lip of the intertubercular sulcus on the anterior surface of the humerus.
Term
Teres Major Innervation
Definition
Inferior Subscapular Nerve C5-C7
Term
Teres Major Function
Definition
Medial rotational and extension of the arm at the gleno-humeral joint
Term
Long Head of Triceps Brachii Origin
Definition
Infraglenoid tubercle of scapula
Term
Long Head of Triceps Brachii Insertion
Definition
Common tendon of insertion with medial and lateral heads on the Olecraneal process of the Ulna
Term
Long Head of Triceps Brachii Innervation
Definition
Radial Nerve C6-C8 (C7 is major Innervator)
Term
Long Head of Triceps Brachii Function
Definition
Extension of the forearm at the elbow joint, accessory adductor, extension of the arm at the gleno-humeral joint
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