All are true about thoraco-lumbar fascia except
The thoracolumbar fascia is a deep investing membrane throughout most of the posterior thorax and abdomen although it is a thin fibrous lamina in the thoracic region. Above, it is continuous with a similar investing layer on the back of the neck the nuchal fascia. Ref - semantischolar.org
Attachment to the spinous process of lumber veebra
Origin to the transversus and internal oblique muscles
Lumber pa situated in the interval between the iliac crest and the 12th rib
Attachment to the transverse process of lumber veebra
Abdomen and pelvis