The low back is defined by the lumbar spine, composed of 5 vertebrae, named L1-L5. The pelvis is defined by the bones of the pelvic girdle.
Transversospinalis in the Laminar Groove
The transversospinalis musculature is extremely important functionally, and important with pain and dysfunction. It includes the multifidus, the thickest muscle of the low back; and the semispinalis capitis, the thickest muscle in the back of the neck. When working this musculature, it is extremely important to work very far medially, over the laminar groove of the spine.
