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the muscles of the upper limbs movers of shoulder joint

Origin of latissmus Dorsi

Thoracolumbar aponeurosis,Lower 6 spinous process,sacrum,Iliac crest,Lower 3 to 4 ribs,Inferior Angle of Scapula

Insertion of Latissimus Dorsi

Intetubercular ( bicipital ) grove of humerus

Action of Latissimus Dorsi

Extenstion of humerous,Medial rotation of humerous, Adduction of humerous

Teres Major is also known as

Little Lats

Orgin of Teres Major

Inferior angle of scapula lower1/3 axillary border of scapula

Insertion of Teres major

Bicipita (Intertabercular) groove (medial lip)

Action of Teres Major

Extension of humerus, medial rotation of humerous, adduction of humerus

Origin of Middle Deltoid

Acromion Process (lateral)

Insertion of Middle Deltoid

Deltoid tuberisity

Action of Middle deltoid

Abduction of humerus from 10 - 90 degres

Origin of Anterior Deltoid

Lateral 1/3 of clavicle

Insertion of Anterior Deltoid

Deltoid tuberosity

Action of Anterior Deltoid

flexionof humerus,medial rotationof humerus, horizontal adduction of humerus

Origin of Posteior Deltoid

Spine of scapula

Insertion of Posteior Deltoid

Deltoid Tuberosity

Action of Posteior Deltoid

Extention of humerus, lateral rotation of humerus,horizontal abduction of humerus

Pectoralis major

Effective in flexing the shoulder joint

Pectoralis Minor is lacated deep to pectoralis Major


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