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6 Cards in this Set

  • Front
  • Back
General Attachments, insertions, innervations, functions, and blood supply of the Spinalis muscles
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
Longissimus muscles
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
Iliocostalis
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
Transversospinalis muscles
Attachments: transverse process
Insertions: spinous process
Innervations: posterior branches
Actions: rotation and extension of vertebral column
Explain the functional loss of the deep muscles of the back resulting from nerve lesions to these muscles.
Loss of sensation, muscle weakness, drooping of the spine, irregular posture
Describe the triangle of Petit and its clinical significance.
It is formed medially by the latissimus dorsi muscle, laterally by the external abdominal oblique, and inferiorly by the iliac crest