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6 Cards in this Set
- Front
- Back
General Attachments, insertions, innervations, functions, and blood supply of the Spinalis muscles
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Attachments: spinous process Thoracis: upper lumbar and lower thoracic vertebrae
Insertions: SP of upper thoracic vertebrae Innervations: posterior branch of spinal nerve Functions: laterally, flex the head and neck to the same side. Bilaterally, extend the vertebral column Blood supply: lateral sacral artery |
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Longissimus muscles
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Attachments: transverse process
Innervations: posterior branch of spinal nerve Functions: Laterally, flexes head and neck to same side. Bilaterally, extend the vertebral column Blood supply: lateral sacral artery |
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Iliocostalis
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Attachments: Sacrum/Illiac Crest/Spinous Processes of lower lumbar/thoracic vertebrae
Insertions: Ribs Innervations: posterior branch of spinal nerve Functions: Laterally, flex head and neck to same side. Bilaterally, extend vertebral column Blood supply: intercostal and lumbar arteries |
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Transversospinalis muscles
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Attachments: transverse process
Insertions: spinous process Innervations: posterior branches Actions: rotation and extension of vertebral column |
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Explain the functional loss of the deep muscles of the back resulting from nerve lesions to these muscles.
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Loss of sensation, muscle weakness, drooping of the spine, irregular posture
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Describe the triangle of Petit and its clinical significance.
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It is formed medially by the latissimus dorsi muscle, laterally by the external abdominal oblique, and inferiorly by the iliac crest
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