Spinalis Thoracis Origin
Spinous processes T11-L2
Spinalis Cervicis Origin
Spinous processes C7-T1 or nuchal ligament
Spinalis Capitis Origin
Spinous processes C6-T2 or nuchal ligament
Spinalis Thoracis Insertion
Spinous processes T2-T8
Spinalis Cervicis Insertion
Spinous processes C2 or C3
Spinalis Capitis Insertion
Occiput
Actions
- Bilateral contraction: extension of the trunk and neck (at cervical and thoracic spine)
- Unilateral contraction: lateral flexion of the trunk and neck (at cervical and thoracic spine)
Innervation
- Posterior rami of the lumbar, thoracic, and cervical nerves
Blood Supply
- Dorsal branches of the posterior intercostal artery, deep cervical artery, and muscular branches of vertebral artery
Would you like to learn more about the spinalis muscle? Then check out the spinalis muscle article and video by clicking the link below: Spinalis Muscle Anatomy
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