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- Deltoid
- Insertion: deltoid tuberosity of humerus
- Action:
- Anterior: flexes and medially rotates humerus
- Middle: abduction
- Posterior: Extends and laterally rotates humerus
- Nerve: axillary nerve
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- Serratus Anterior
- Insertion: anterior surface of the medial border of the scapula
- Action: scapula protraction, holds scapula to thoracic wall, rotation of scapula
- Nerve: long thoracic nerve
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- Pectoralis Minor
- Insertion: 3rd-5th ribs hear the costal cartilage
- Action: draws scapula inferior and anterior
- Nerve: medial pectoral nerve
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- Pectoralis MajorOrigin:
- Clavicular: anterior medial 1/2 of clavcle
- Sternal: anterior sternum and superior 6 costocartilages, aponeurosis of exeternal oblique
- Insertion: lateral lip of the intertubercular groove of humerus
- Action: adducts and medially rotates humerus. Flexes humerus.
- Nerve: medial and lateral pectoral nerves
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- Levator Scapulae
- Insertion: medial superior border of scapula
- Action: elevates scapula and rotates glenoid inferiorly
- Nerve: dorsal scapular nerve
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- Rhomboid Minor
- Insertion: medial border of scapula
- Action: retracts scapula, rotates scapula to depress glenoid, scapula fixator
- Nerve: dorsal scapular nerve
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- Rhomboid Major
- Origin: spinous processes of T2-T5
- Insertion: Medial border of scapula
- Action: retracts scapula, rotates scapula to depress glenoid, scapula fixator
- Nerve: dorsal scapular nerve
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- Latissimus Dorsi
- Insertion: Floor of intertubercular groove of humerus
- Action: extedns adducts and medially rotates humerus
- Nerve: thoracolumbar nerve
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- Trapezius
- Insertion: lateral 1/3 of scapula, acromion, and spine of scapula
- Action: scapula elevation, depression, and retraction
- Nerve: spinal accessory nerve
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