Anatom3DMiddle layer of thoracolumbar fascia
Lamina media fasciae thoracolumbalis · Střední list hrudně-bederní povázky
Fascia & connective tissue
Looks like
A sheet of fascia between the erector spinae and quadratus lumborum, attached to the tips of the lumbar side processes.
What it does
Anchors the deep belly muscle and separates the back muscle compartments.
Keeping it well
Part of the 'corset' of the lower back; core exercise uses its tension.