Longissimus Thoracis Muscle
The multifidus muscle is one of the deep back muscles and part of the erector spinae group.
Attachments of Multifidus: Origin & Insertion
Insertion: Spinous processes of vertebrae (except C1), 2-4 bones above origin.
Actions of the Multifidus Muscle:
- Bilateral action: extends vertebrae (except C1), 2-4 bones above origin.
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Nerve Supply to Multifidus:
- dorsal rami of spinal nerves.