Spinalis Cervicis Muscle
Spinalis Thoracis Muscle
Attachments of Spinalis Thoracis: Origin & Insertion
Origin: Spinous processes of T11 (or T10) – L2 (or L3).
Insertion: Spinous processes of T3 (or T1/T2) – T8.
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Actions of the Spinalis Thoracis Muscle:
- Bilateral action: extends and hyperextends vertebral column (back).
Nerve Supply to Spinalis Thoracis:
- dorsal rami of the thoracic and lumbar spinal nerves.