Action of iliocostalis lumborum?

Master the Back Muscles: Origins, Insertions, Actions and Innervations with a comprehensive quiz. Engage with diverse question formats, including multiple choice and flashcards, each supplemented with hints and explanations. Ensure your readiness for academic and professional success!

Multiple Choice

Action of iliocostalis lumborum?

Explanation:
The iliocostalis lumborum, as part of the erector spinae, acts mainly on the spine. Its fibers run from the iliac crest and lower back up to the angles of the lower ribs, so when both sides contract, they pull the vertebral column upward and back, producing extension of the spine. When only one side contracts, they pull the spine to that side, causing lateral flexion. In short, it extends and laterally flexes the vertebral column. It doesn’t flex the cervical spine, doesn’t abduct the scapula, and isn’t primarily a rib-depressing muscle.

The iliocostalis lumborum, as part of the erector spinae, acts mainly on the spine. Its fibers run from the iliac crest and lower back up to the angles of the lower ribs, so when both sides contract, they pull the vertebral column upward and back, producing extension of the spine. When only one side contracts, they pull the spine to that side, causing lateral flexion. In short, it extends and laterally flexes the vertebral column. It doesn’t flex the cervical spine, doesn’t abduct the scapula, and isn’t primarily a rib-depressing muscle.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy