Structures

  • Semispinalis thoracis
  • Semispinalis cervicis
  • Semispinalis capitis
  • Multifidus
  • Rotatores lumborum
  • Rotatores thoracis
  • Rotatores cervicis
MuscleActionOriginInsertionInnervationBlood supply
Semispinalis thoracis- Extends the neck
- Rotates head to opposite side
- Transverse processes of T6-10- Spinous processes of C5-T4- Dorsal rami T1-9- Posterior intercostal arteries
Semispinalis cervicis- Extends the neck
- Rotates head to opposite side
- Transverse processes of T1-5- Spinous processes of C2-C5- Dorsal rami C3-T5- Deep cervical artery
- Posterior intercostal arteries
Semispinalis capitis- Extends neck
- Rotates head to opposite side
- Transverse processes of C7-T6- Occiput- Dorsal rami C2-T6- Deep cervical artery
Multifidus- Postural and dynamic support of the vertebral column- Sacrum
- Posterior superior iliac spine
- Mammillary processes of L1-5
- Transverse processes of T1-12
- Articular processes of C3-7
- Spinous processes of C2-L5- Dorsal rami C3- L5- Lumbar arteries
- Posterior intercostal arteries
- Occipital artery
Rotatores lumborum- Weak extension lumbar spine
- Proprioception
- Mammillary processes of L1-5- Spinous processes of L1-5- Dorsal rami L2-5- Lumbar arteries
Rotatores thoracis- Weak extension thoracic spine
- Proprioception
- Transverse processes of T1-12- Spinous processes of T1-12- Dorsal rami T1-11- Posterior intercostal arteries
Rotatores cervicis- Weak extension of cervical spine
- Proprioception
- Articular processes of C1-7- Spinous processes of C1-7- Dorsal rami C3-8- Occipital artery