Editing Retroperitoneum (section)

== Lumbodorsal fascia ==

* '''Merges anterolaterally with the transversus abdominis muscle''', [and posteriorly with transversalis fascia]
* Composed of 3 layers that cover the posterior abdominal wall musculature.
** '''The posterior lamella''' originates medially from the spinous process of the lumbar vertebrae and covers the erector spinae muscles.
** '''The middle lamella separates the erector spinae muscles from quadratus lumborum.'''
** '''The anterior lamella covers the ventral surface of quadratus lumborum'''. Extending medially, the anterior lamella attaches to the vertebral transverse process and is continuous with the fascia that invests the psoas muscle
* '''The retroperitoneum can be entered without incising muscle using a dorsal lumbotomy incision. This approach uses a vertical incision through the lumbodorsal fascia lateral to the erector spinae and quadratus lumborum muscles'''