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Vertebral Muscles

11.3--Muscle Groups

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
Created by: 100000434525601



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