<prompt> All are true about Thoracolumbar fascia except -Attached to spinous process of lumbar vertebraAttached to transverse process of lumbar vertebraThe fascia lies posterior to posterior abdominal wall muscles.Gives attachment to Transversus abdominis and internal oblique muscles  <response>: Thoracolumbar fascia- Lumbar part extends between the 12th rib and iliac crest.- It has 3 layersAnterior layer Attachment - Anterior surface of the transverse process of lumbar vertebraePosition - anterior to quadratus lumborumMiddle layerAttachment - the Transverse process of lumbar vertebraePosition - Posterior to quadratus lumborum but anterior to erector spinae.Posterior layerAttachment - the Spinous process of lumbar vertebraePosition - Posterior surface of erector spinae.- At the lateral margin of erector spinae, posterior and middle layers unite. Further, anterior layer joins at the later margin of quadratus lumborum. Together they form the aponeurotic origin of transversus abdominis. It also acts as the origin for internal oblique muscle. 