Erector Spinae

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Other Names Lower Back Heads Iliocastalis Lumborum Thoracis Cervicis Longissimus Thoracis Cervicis Capitis Spinalis Thoracis Cervicis Capitis Movement Spine (Lumbar, Thoracic) Extension [1, 2, 3 ] Lateral Flexion [1 ] Rotation [1] Spine (Cervical) Extension [1, 2, 3 ] Lateral Flexion [1, 2] Rotation [1, 2] Neck (Atlantooccipital & Atlantoaxial) Extension Both Sides [2, 3 ] Rotation Rotation right [Right 2, 3 ] Rotation left [Left 2, 3 ] Lateral Flexion Lateral flexion right [Right 2, 3 ] Lateral flexion left [Left 2, 3 ] Attachments Origin Sacrum Lower Posterior Surface [1 ] Transverse Processes [2 ] Ribs (Posterior) [1 ] Lumbar Vertebrae Transverse Processes [2 ] Thoracic Vertebrae Transverse Processes [2, 3 ] Cervical Vertebrae Transverse Processes [3 ] Ligamentum Nuchae (Posterior Neck Ligaments) [3 ] Insertion Ribs (Posterior) [1 ] Cervical Vertebrae Transverse Processes [1, 2 ] Spinous Processes [3 ] Thoracic Vertebrae Transverse Processes [2 ] Spinous Processes [3 ] Skull Mastoid Process [2 ] Occipital Bone [3 ] Related Muscles Splenius Quadratus Lumborum Comments See erector spinatus weakness.