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Stack #60657, week 2
Stack #60657, week 2 muscles
muscle | origin | insertion | action | nerve |
---|---|---|---|---|
anterior scalene | transverse processes of cervical vertebrae 3-6 | First rib | acting together, right and left anterior scalene and middle scalene muscles flex head and elevate first ribs during deep inhalation; acting singly, laterally flex head and rotate head to side OPPOSITE contracting muscle | cervical spinal nerves C5-C6 |
middle scalene | transverse processes of inferior 6 cervical vertebrae | first rib | acting together, right and left anterior scalene and middle scalene muscles flex head and elevate first ribs during deep inhalation; acting singly, laterally flex head and rotate head to side OPPOSITE contracting muscle | cervical spinal nerves C3-C8 |
posterior scalene | transverse processes of cervical vertebrae 4-6 | Second ribs | acting together, flex head and elevate second ribs during deep inhalation; acting singly, laterally flex head and rotate head to side OPPOSITE contracting muscle | Cervical spinal nerves C6-C8 |
Splenius Capitus | ligamentum nuchae and spinous processes of cervical vertebrae 7 and T1-T3 or T4 | Occipital bone and mastoid process of temporal bone | acting together, extend head; singly, laterally flex and rotate head to same side as contracting muscle | middle cervical spinal nerves |
splenius cervicus | spinous processes of T3-T6 | transverse processes of first 2 or 4 cervical vertebrae | acting together, extend head; acting singly, laterally flex and rotate head to same side a scontracting muscle | inferior cervical spinal nerves |