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HANDBOOK OF ANATOMY 



ma'gnus and becomes cutaneous on the inner side of the knee- 

 joint by passing between sartor ius and gracilis. It passes down 

 the inner side of the leg with the internal saphenous vein, and 

 supplies the skin of the front and inner side of the leg and 

 posterior half of the dorsum and inner side of the foot. 



The Patellar Plexus is formed by the branches of the 

 cutaneous nerves supplying the skin in front of the knee viz., 



To Lumbar Plexus 



Perforating Cutaneous 



To CoccygeaJ Plexus 



Pudic 



FIG. 69. SACRAL PLEXUS. 



B 



1, i, i. Nerve to Quadratus Femoris 



2, 2, 2. Nerve to Obturator Internus 



3, 3, 3. Small Sciatic Nerve 



4 S. Fourth Sacral, giving a Branch to 

 Sacral Plexus 



V. Visceral Branches 



M. Muscular Branches 

 T.C. Terminal Cutaneous Branches 



the long saphenous, internal and middle cutaneous, all branches 

 of the anterior crural nerve, and sometimes a branch of the 

 external cutaneous nerve. 



The Sacral OP Sciatic Plexus is formed by the anterior divi- 

 sions of the fourth and fifth lumbar nerves and the first three 

 sacral nerves. The plexus is formed on the anterior surface of 

 pyriformis, all the nerves joining to form a large triangular trunk 



