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Vertebral Muscles
11.3--Muscle Groups
| Term | Definition |
|---|---|
| Splenius Capitus | O: Ligamentum nuchae and spinous processes I: Occipital bone and mastoid process of temporal bone A: Acting together, exten head, lateral flexion and rotation of head |
| Splenius Cervicis | O: Spinous process I: Transverse process of C |
| Erector Spinae | Iliocostalis muscles, longissimus muscles, and spinalis muscles |
| Iliocostalis Cervicis | O: Ribs 1-6 I: Transverse processes of C4-C6 A: Maintain posture; lateral flexion |
| Iliocostalis Thoracis | O: Ribs 7-12 I: Ribs 1-6 A: Smae as before |
| Iliocostalis Lumborum | O: Iliac crest I: Ribs 7-12 A: Same as above |
| Longissimus Capitis | Same as in Neck muscles |
| Longissimus Cervicis | O: T4-5 I: C2-C6 A: Extend vertebral column, and lateral flexion individually |
| Longissimus Thoracis | O: Transverse Process of lumbar I: Transverse Process of Thoracic and Superior Lumbar vertebrae A: Extend vertebral column, and single lateral flexion |
| Spinalis Capitis | Same as before |
| Spinalis Cervicis | O: Ligamentum Nuchae I: Spinous process of axis A: Extension of vertebral column in respective region |
| Spinalis Thoracis | O: Spinous process of C7 I: Spinous process of superior thoracic vertebrae |
| Multifidus | O: Sacrum, ilium, transverse processes of lumbar, thoracic and cervical I: Spinous process of more superior vertebra A: Act together, extend vertebral column, lateral flexion |
| Rotatores | O: Transverse processes of all vertebrae I: Spinous process of vertebra superior to origin A: Act together, weakly rotate vertebral column to side opposite contracting muscle |
| Interspinales | O: Superior surface of all spinous processes I: Inferior surface Action: Extension of vertebral column |
| Intertransversaril | O: Transverse processes of all vertebrae I: Transverse process of vertebra superior to origin A: Act together, weakly extending column, flexing column and stabilizing it |
| Anterior, Middle, Posterior Scalene | Elevate ribs during inhalation |