Muscles connecting The Upper Limb To The Thoracic Wall


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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