====== Erector spinae muscles ====== The [[erector]] [[spinae muscles]] is not just one [[muscle]], but a group of muscles and [[tendon]]s which run more or less the length of the [[spine]] on the left and the right, from the [[sacrum]] or [[sacral region]] (the bony structure beneath the lower back [lumbar] vertebrae and between your hips/glutes) and hips to the base of the [[skull]]. They are also known as the sacrospinalis group of muscles. These muscles lie on either side of the [[vertebral column]] [[spinous process]]es (the bony points up and down the middle of the back) and extend throughout the lumbar, [[thoracic]], and [[cervical region]]s (lower, middle, and upper back and the neck). The erector spinae is covered in the lumbar and thoracic regions (lower back and lower middle back) by the [[thoracolumbar fascia]], and in the cervical region (neck) by the nuchal ligament.