1016 



THE NERVOUS SYSTEM 



Table Showing Ordinary Relations of Lumbar and Sacral Nerves to 

 Branches of the Lumbar and Sacral Plexuses and to the Pudic Nerve 



Nerves Contributing. 



Nerves. 



■, r / Ilio-hypogastric 



\ Ilio-inguinal 



1 and 2 L Genito-femoral 



1, 2, and 3 L Lateral cutaneous 



Q ^^A A T /Femoral 

 2' 3, and 4 L j Obturator 



4 ^ L and IS < ^'^P^'^i^r gluteal 



' ■' \ Nerve to quadratus femoris 



4, 5 L., 1 and 2 S Sciatic (peroneal part) 



4, 5 L., 1, 2, and 3 S Sciatic (tibial part) 



5 L., 1 and 2 S | J?^^"°^ gluteal 



' \ Nerve to obturator mternus 



1 and 2 S Nerve to piriformis 



2 and 3 S Medial inferior clunial 



1, 2, and 3 S Posterior femoral cutaneous 



2, 3, and 4 S Pudic 



Table Showing Relations of Muscles of Lower Extremity to Nerves of 

 Lumbar and Sacral Plexuses 



Nerves Contributing. 



Muscles. 



4, 5L., and 1 S. 



Illio-psoas 

 Sartorius 

 Pectineus 

 Adductor longus 



o Q o^^ A 1 / Gracilis 



2, 3, and 4 I. < Adductor brevis 



Q J -1 T / Quadriceps femoris 



•^ ^^^ * ^ \ Obturator externus 



3, 4, and 5 L Adductor magnus 



' Gluteus medius 



" minimus 

 Tensor fasc. latae 

 Semimembranosus 

 Plantaris 

 Popliteus 

 Quadratus femoris 

 Inferior gemellus 

 Flex, digit, long. 

 Tibialis posterior 

 Flexor digit, brev. 



" hallucis brev. 

 Abductor hallucis 

 First lumbrical 

 Superior gemellus 

 Obturator internus 

 Gluteus maximus 

 Semitendinosus 

 Soleus 



Flex, hallucis long. 

 Piriformis 

 Gastrocnemius 

 Flexor quadratus plantae 

 Abd. quinti digiti 

 Plantar interossei 

 Dorsal " 



Add. hallucis trans. 

 " obliq. 



1, 2, and 3 S Long head of biceps femoris 



' Ext. hall. long. 



5 L., and 1 S. 



5L., 1 and 2 S. 



1 and 2 S. 



4, 5L., and 1 S. 



" digit. 



" digit, brov. 



Tibialis anterior 



Peroneus fortius 



" longus 



" brevis 



Nerves. 



Femoral 



(( 



u 



Obturator 



Femoral 

 Obturator 



Obturator and sciatic 

 Superior gluteal 



Sciatic 



Tibial 



(( 



Nerve to quad. fem. 



Tibial 



Posterior medial 

 Plantar 



Nerve to obt. int. 



Inferior gluteal 



Sciatic 



Tibial 



Tibial 

 Lateral plantar 



Sciatic 



Deep peroneal 



Superficial peroneal 

 " peroneal 



THE PUDENDAL PLEXUS 



The pudendal plexus, like the parts of the lumbo-sacral plexus already 

 describccl, varies in its formation. The accompanying tables show the extreme 



