LUMBAR FASCIA 99 



The Lumbar Fascia is attached to the lumbar vertebrae in 

 three layers the outermost layer, to the spines ; the middle 

 layer, to the transverse processes; the innermost layer, to the 

 bodies, near the roots of the transverse processes. 



The outermost layer covers the dorsal surface of erectpr_ 

 spinae. 



The middle layer lies between erector spinae and quadra tus 

 lumborum. 



The innermost layer covers the ventral surface of quadratus 

 lumborum. 



The middle layer then splits into two, so that four layers of 

 fascia are formed for the three layers of abdominal muscles. 



1. Covers the outer surface of external oblique. 



2. Lies between external and internal oblique. 



3. Lies between internal oblique and transversalis. 



4. Covers -the inner surface of transversalis. 



At the outer border of rectus abdominis these four layers 

 now join again to form two layers, which pass one in front of, 

 the other behind, rectus abdominis, forming what is called the 

 sheath of the rectus ; this takes place in the upper three- 

 fourths of the muscle. In the lower fourth both the layers of 

 fascia pass in front of the rectus, so that on its ventral surface 

 three-fourths of the way down there is a free edge of fascia, 

 known as the fold of Douglas. 



