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Lab 10: Muscles that Move the Shoulder

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  • Trapezius

    Origin: occipital bone & thoracic vertebrae

    Insertion: scapula & clavicle

    Action: adducts, elevates, and stabilizes scapula ; extends neck

  • Levator Scapulae

    Origin: cervical vertebrae

    Insertion: scapula

    Action: adducts and elevates scapula

  • Rhomboid Major

    Origin: thoracic vertebrae

    Insertion: scapula

    Action: adducts and stabilizes scapula

  • Rhomboid Minor

    Origin: cervical vertebra & thoracic vertebra

    Insertion: scapula

    Action: adducts and stabilizes scapula

  • Pectoralis Minor

    Origin: ribs 3-5

    Insertion: scapula

    Action: abducts scapula

  • Serratus Anterior

    Origin: ribs 1-8

    Insertion: scapula

    Action: lateral rotation of scapula & pulls scapula against the chest wall