Erector Spinae

**Semantic type:** Anatomical Structure

**Definition:** A group of three muscles (iliocostalis, longissimus, and spinalis) that originate at the sacrum, ilium, and lumbar vertebrae spines and insert into the ribs and vertebra in order to extend the vertebral column.

**Synonyms:** - Extensor Spinae - MUSCLE, ERECTOR SPINAE - PARASPINAL MUSCLES - Sacrospinalis Muscle