Lower back and posterior trunk

Thoracolumbar fascia

Structure, mechanical relationships and comfortable observation.

Simplified relationship map. Connections are schematic, not a to-scale anatomical view or a fixed direction of force.

Anatomy and attachments

A multilayered connective-tissue complex around the lumbar paraspinal muscles. It connects with vertebral processes, sacrum, iliac crests and lower ribs, and blends with attachments of latissimus dorsi, transversus abdominis and internal oblique. Layer descriptions vary by anatomical convention.

Mechanical role

Provides muscle attachment and helps distribute tension across the trunk and pelvis. Its contribution changes with muscle activity, posture and loading.

Observe a relationship

Compare a comfortable forward bend with a supported hip hinge. Notice where movement occurs and whether sensation changes with support.

Building broader Myos patterns

Record what changes with position, support and task. Consider neighboring muscles, joints, nerves and load demands. Keep anatomical connections and observed responses distinct as the pattern develops.