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.

Hamstring Group. Permission Joseph E. Muscolino. Manual Therapy for the Low Back and Pelvis - A Clinical Orthopedic Approach (2015)

Five Muscles of Sacroiliac Stabilization – Part 3 – Hamstrings

The connection between the hamstrings and the sacroiliac joint is through what is known as the superficial back line myofascial meridian/anatomy train. If the hamstrings are tight, their tension pulling force will be exerted through the sacrotuberous ligament and onto the sacrum.