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16 Cards in this Set
- Front
- Back
Glenohumeral Joint
What type of Joint? |
Ball and Socket Joint
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Ligaments
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Weakest Ligaments in body. Tendons of the shoulder muscle will function in a ligamentous role.
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What Type of Movements of the Shoulder Joint?
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Flexion
Extension Abduction ( Up to 90 degrees) Adduction Medial Rotation Lateral Rotation |
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What are the Rotator Cuff Muscles.
S. I. T. S. |
Supraspinatous
Infraspinatous Teres Minor Subscapularis |
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What are the common functions, attachments and actions?
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Functions - They form a cuff that anchors the head of the humerus to the glenoid cavity of the scapula.
Attachments - Greater Tubercle of the Humerus. 3 of the 4 muscles attach from there. Subscapularis is the only one that attaches to the Lesser Tubercle of Humerus Actions - Stabilization of the glenohumerus joint |
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Supraspinatous Muscle
Origin / Insertion Function Structure/Relationship |
Origin - Supraspinous Fossa
Insertion - Greater Tubercle of Humerus Function - Abduction, the first 5 to 10 degrees of abduction S/R - Deep to Trapezius, one of 2 abductors of shoulder. Fills the Supraspinous fossa, passes inferior to the acromion of Scapula |
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Infraspinatus Muscle
Origin / Insertion Function Structure/Relationship |
Origin - Infraspinous Fossa
Insertion - Greater Tubercle of Humerus Function - Lateral Rotation of Shoulder S/R - Deep to Deltoid, fills infraspinous fossa |
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Teres Minor
Origin / Insertion Function Structure/Relationship |
Origin - Lateral Margin of Scapula
Insertion - Greater Tubercle of Humerus Function - Lateral Rotation of Shoulder S/R - Deep to deltoid, superior to Teres Major |
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Subscapularis
Origin / Insertion Function Structure/Relationship |
Origin - Subscapular fossa
Insertion - Lesser Tubercle of Humerus Function - Medial Rotation of Shoulder S/R - Anterior to Scapula, Found between Scapula and Serratis Anterior. Only rotator cuff muscle that attaches to lesser tubercle. Forms posterior wall of axilla (armpit) |
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Shoulder Cap Muscle
What muscle sits over the shoulder muscles? |
Deltoid
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Deltoid
Origin Insertion Function Structure and Relationships |
Origin - lateral 3rd of clavicle, acromion, spine of scapula
Insertion - Deltoid Tuberosity of Humerus Function - Flexion, Medial Rotation, Lateral Rotation, Abduction. S/R - Does everything but ADDUCTION. 1 of 2 Abductors of shoulder. 3 heads: anterio, lateral and posterior. |
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Intertubercular Groove Muscles
"2 Majors and a Little Miss" Name the muscles? |
Pectoralis Major
Teres Major Latissimus Dorsi |
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Pectoralis Major
Origin Insertion Function Structure and Relationships |
Origin - Anterior surface of clavicle, anterior surface of sternum.
Insertion - Intertubercular Groove of Humerus Function - Adduction, medial rotation, Flexion S/R - Most superficial muscle of chest and creates anterior wall to axilla. |
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Teres Major
Origin Insertion Function Structure and Relationships |
Origin - Inferior angle of the scapula
Insertion - Intertubercular Groove of Humerus Function - adduction, medial rotation, extension of flexed shoulder S/R - Inferior to Teres Minor, forms the inferior border to the posterior wall of the axilla. |
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Latissimus Dorsi
Origin Insertion Function Structure and Relationships |
Origin - Spinous processes of T7 to L5, Iiliac Crest, Sacral Vertebrae
Insertion - Intertubercular Grrove Function - Adduction, Medial Rotation, Extension of Flexed shoulder S/R - Deep to Trapezius, Broadest muscle of the back |
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Intertubercular Groove Muscles
Pectoralis Major Teres Major Latissimus Dorsi Common attachments, actions? |
Attachments - Insertion onto the intertubercular groove muscles.
Actions - Powerful abductors and medial rotators of humerus. |