582 



DISSECTION OF THE BUTTOCK. 



cutaneous branch (p. 416). This offset perforates the muscles of the abdo- 

 men, and crosses the anterior part of the iliac crest to be distributed over 

 the fore part of the gluteal region, as low as the great trochanter. 



Nerves of the lumbar plexus. Parts of two nerves of the lumbar plexus 

 (p. 496), viz. ilio-hypogastric and external cutaneous, are spent in the 

 integuments of this region. 



The iliac branch of the ilio-hypogastric ( 7 ) crosses the iliac crest in 

 front of the branches from the lumbar nerves, lying generally in a groove 

 in the bone, and extends only a short distance below the crest. 



Fig. 199. 



A. Glutens maximus muscle, with 

 the gluteus medius projecting 

 above it. 



a. Continuation of small sciatic ar- 

 tery along the back of the thigh. 

 Nerves and vessels, most of them 

 cut from the teguments : 



1. Small sciatic nerve the trunk. 



2. Its cutaneous thigh branches ; & 



3. Inferior pndendal. 



4. Small sciatic offsets in the peri- 



neum. 



5. Cutaneous of the sacral. 



6. Offsets of the lumbar nerves. 



7. Ilio-hypogastric 



8. Branch of the last dorsal. 



SDPKRFICIAI, VIEW OF THE BUTTOCK OF THE LEFT SIDE (Illustrations of Dissections). 



Offsets of the external cutaneous nerve of the thigh bend backwards to 

 the integuments above the great trochanter, and cross the ramifications of 

 the hist dorsal nerve. 



Small sciatic ( J ). This nerve of the sacral plexus (p. 518) Fends super- 

 ficial branches to the buttock. Its cutaneous offsets appear along the 

 lower border of the gluteus maximus, accompanied by superficial branches 



