538 



SURGICAL APPLIED ANATOMY. [Chap. xxm. 



been injured and a limited form of paralysis has 

 followed in consequence. 



Paralysis of the anterior crural nerve 



has been caused by injuries to the lower part of the 

 vertebral column implicating the cauda equina, by 

 fractures of the pelvis, by tumours of the pelvis, by 

 psoas abscess, by fractures aiitP dislocations"^! the 



Fig. 60. Amputation of Great Toe, with its Metatarsal Bone ..Agatz). 



a, Internal cuneiform bone ; 6, adductor pollicis: c, extensor Iqngus po'licis; 

 d, flexor longus pollicis ; e, plantar branch of dorsalis pedis artery. 



femur, and by stabs in the region of the groin. In 

 this nerve lesion the patient is unable to flex the hip 

 and to raise the body from the recumbent position 

 (ilio-psoas). The power of extending the leg at the 

 knee is lost (quadriceps extensor cruris) ; the function 

 of the sartorius is destroyed and that of the pectineus 

 impaired. Sensation is impaired in parts supplied by 

 the internal and middle cutaneous nerves and the long 

 saphenous nerve. 



Paralysis of the obturator nerve alone is a 

 rare condition, although it may be found associated 

 with a like lesion of the preceding trunk. It may be 

 brought about by the pressure exercised upon the nerve 

 in cases of obturator hernia and by the foetal head 



