Origin, Insertion, Function, and Innervation
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each of the black spaces below before clicking
on it to display the answer.
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| Trapezius | Occipital bone, ligamentum nuchae, spines of C7 and T1-T12 | Clavicle, acromion and superior spine of scapula | Both elevates (upper fibers) and depresses (lower fibers) shoulder; retracts scapula; also extends head | Accessory n.
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| Latissimus Dorsi | Spines of T6-T12, lumbar vertebrae, saccral crest, iliac crest, lower 3 or 4 ribs. | Intertubercular groove of humerus | Adducts, extends, and medially rotates arm | Thoracodorsal n.
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| Rhomboideus Major | Spinous processes of T2-T5. | Vertebral border the scapular inferior to the spine. | Elevates and adducts scapula | Dorsal Scapular n.
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| Rhomboideus Minor | Spinous processes of C7 and T1. | Vertebral border of the scapula superior to the spine. | Elevates and adducts scapula | Dorsal Scapular n.
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| Thoracolumbar Fascia | covers deep muscles of back; attached medially to spines of vertebrae; inferiorly to ilium; provides for muscle attachments. | not listed | not listed | not listed
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| Levator Scapula | Vertebrae - transverse processes of C1-C4 | Scapula - superior angle and medial border | Elevates and adducts scapula | Dorsal Scapular n.
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| Splenius Capitis | Lower portion of ligamentum nuchae and spinous processes of C7 and T1-T4. | Mastoid process of temporal bone and occipital bone. | Extend neck and head | Dorsal rami of spinal nerves
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| Semispinalis capitis | thorasic and cervical vertebrae occipital bone | occipital bone | extends head | dorsal rami
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| Erector spinae-iliocostalis | from Ilium and ribs | Spinous processes six levels above | Extend trunk and vertebral column | Dorsal Rami
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| Erector Spinae-Longissimus | from transverse processes of vertebrae | to transverse processes of vertebrae | Extend trunk and vertebral column | Dorsal Rami
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| Erector Spinae-Spinalis | from spinous processes | to spinous processes | Extend trunk and vertebral column | Dorsal Rami
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Created by:
LKRitchey
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