Origin: Spinous process and transverse processes of cervical, thoracic and upper lumbar vertebrae
Insertion: Base of skull and spinous processes of cervical and upper thoracic vertebrae
Action: Two sides act together to extend vertebral column; either alone extends the neck and laterally flexes head or rotates vertebral column to that side
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| Spinalis Cervis Muscle |
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| Spinalis Thoracis |
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