Muscles connecting The Upper Limb To The Thoracic Wall Assignment Help

MUSCLES ORIGIN INSERTION NERVE SUPPLY NERVE ROOTS ACTION
Pectoralis major Clavicle,sternum, and upper six costal cartilage Lateral lip of bicipital groove of humerus Medial and lateral pectoral nerve from brachial plexus C5,6,7,8;T1 Adducts arm and rotates it medially;clavicular fibres also flex arm
Pectoralis minor Third, fourth, and fifth ribs Coracoid process of scapula Medial pectoral nerve C6,7,8 Depresse point of shoulder, and elevates the ribs
Subclavius First costal cartilage Clavicle Nerve to sub clavius C5,6 Depresses clavicle
Serratus anterior Upper eight ribs Medial border and inferior angle of scapula Long thoracic nerve C5,6,7 Draws the scapulla forward and rotates scapula.

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