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23 Cards in this Set
- Front
- Back
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Extrinisic muscles of the back
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Trapezius
Rhomboids Levator Scapulae Deltoid Latissimus dorsi |
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Splenius cercicis
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extends to transverse process of C1-3 or C4
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Splenius capitis
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extned to mastiod process of the temporal bone and lateral third line of occipital bone
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Intrinisic Muscles of the back
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Splenius muscles
cervicis an capitis Erector spinae (3 muscles) spinalis thoracis Longissimus Iliocostalis |
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Erector Spinae
3 group of muscles |
spinalis thoracis
Longissimus Iliocostalis posterior rami of spinal nerves act together to extend the spinal collum or work independently to bend the colloum laterally |
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Spinalis
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most medial and go to spious process
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Longissimus
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apart of the Erector spinae
runs superiorly to ribs and between tubercle and transverse process |
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iliocostalis
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a part of the erector spinae
angle of lower ribs and cervical transverse process |
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Transversospinal group
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group of muscles consisting of the dep layer of intrinsic back muscles
extend spine, stabilize local spine, and for rotation semispinalis Multifundus Rotatores |
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Semispinalis
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most superficial of group
transverse processes of c4- t12 to the spinious process spanns 4-6 segments |
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Multifidus
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middle region
short, trianglular muscles thinckest in the lumbar region span 2-4 segments |
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Rotatores
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help to rotate the spine
Brevis- span 1 segment Longus- span 2 segments |
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Minor deep layer
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Interspinales
Intertransversarii Levator costarum |
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Interspinales
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spinious process to spinosus process
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Intertransversarii
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transverse process to transverse process
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Levator Costarum
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from transverse process to rib between the tubercles and angle
helps elevate ribs only in thoacis region |
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Suboccipital Triangle
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helps to keep head balanced
Retus Capitis Posterior Major Retus Capitis Posterior Minor Superior obliquus capitis Inferior Obliquss capitis nerve suboccipital nerve |
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suboccipital nerve
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from posterior rami of C1
suppilies the muscles of the suboccipital triangle |
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Greater occipital nerve
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innervates the skin over the neck and occipital bone
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Latissimus Dorsi
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adducts the shoulder to the body
downward rotation of the scapula adducts the arm to the body Thoracodorsal nerve C6,C7, C8 |
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Rhomboids
Major and minor |
Dorsal scapular nerve pure C5
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Levator Scapulae
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Dorsal scapular nerve- pure C5
bilateral--extends neck backwards unilateral-- tilt neck the contracting muscle |
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Deltoid
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axillary Nerve C5, C6
passes inferior to humerous head and winds around the surgical neck injured in fractures dislocation and crutches causes decreases sensation and deltoid atrophy |
