Upper Extremity

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    • Pectoralis Major
    • Origin: Cartilages of ribs 2-6, Sternum, Clavicle
    • Insertion: Greater tubercle of humerus
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    • Trapezius
    • Origin: Occipital bone and spinous processes of thoracic vertebrae
    • Insertion: Clavicle and scapula (acromion and scapular spine)
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    • Latissimus dorsi
    • Origin: spinous processes of lower thoracic vertebrae, ribs and lumbar vertebrae
    • Insertion: Intertubercular groove of humerus
    • Action: Extension, adduction, and medial rotation at shoulder
    • Innervation: Thoracodorsal, C6,7,8
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    • Rhomboid Major
    • Origin: Spinous processes of 2nd-5th thoracic vertebrae
    • Insertion: Medial border of scapula
    • Action: Adduct and elevate the scapula, and rotate it so the glenoid cavity faces caudally.
    • Innervation: Dorsal scapular, C4,5
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    • Rhomboid Minor
    • Origin: Ligamentum nuchae, spinous processes of C7 and T1
    • Action Adduct and elevate the scapula, and rotate it so the glenoid cavity faces caudally.
    • Inneravtion: Dorsal Scapular, C4,5
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    • Levator Scapulae
    • Origin: Transverse processes of C1-C4
    • Insertion: Medial border of scapula between superior angle and root of spine.
    • Action: Elevates scapula
    • Innervation: Cervical 3, 4 and Dorsal scapular C4,5
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    • Supraspinatus
    • Origin: Supraspinous fossa of scapula
    • Insertion: Lesser tubercle of humerus
    • Action: Medial rotation at shoulder
    • Inneravtion: Suprascapular, C4,5,6
Card Set:
Upper Extremity
2013-11-14 03:31:04
Upper Extremity Muscles

Muscle attachments and innervations
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