PRACTICAL ANATOMY. 



\\liat is the special name for the tu'o inches of t lie greater sacro-sciatic ligament 

 that is prolonged on to the inner margin of the ascending rannts of the iscluum f 



It is called the falciform ligament. (Fig. 328.) This ligament unites with 

 the obturator fascia to strengthen Alcock's canal, in which canal are located the 

 internal pudic nerve and vessels. 



What are the functions of the greater sacro-sciatic ligament, exclusive of its 

 special part the falciform ligament / 



It gives partial origin to the gluteus maximus muscle, and converts the lesser 

 sacro-sciatic notch into a foramen. 



Name the structures that pass through the lesser sacro-sciatic foramen. 



(i) The tendon of the obturator muscle and its nerve; (2) the internal 

 pudic nerve and vessels. 



Locate the lesser sacro-sciatic ligament. 



The lesser or anterior sacro-sciatic ligament is attached above to the margin 



Superior saero-iliac 

 ligament 



Anterior eacro-iliac 



ligament 



Inferior saoro-iliac 

 ligament 



Small sacro-sciatic 

 ligament 



Great sacro-sciatic 

 ligament 



Fi<;. 329. VERTICAL ANTKRO-POSTKRIOK SECTION OK Tin: I'KI.VIS. 



of the sacrum and coccyx ; below, to the spine of the ischium. This ligament 

 converts the greater sacro-sciatic notch into a foramen. 



Name structures transmitted hy the greater sacro-sciatic foramen. 



(l) The pyriformis muscle, above which pass out the glutcal nerve ami 

 vessels, and below which muscle pass out the sciatic vessels and nerves, the 

 internal pudic nerve and vessels, and the branch of the sacral plexus that sup- 

 plies the obturator muscle. 



\arne all (he structures that /cave tlie pelvis through the greater sacro-sciatic 

 foramen, cross (he iscl/ial spine, and reenter the pelvis through the lesser sacro- 

 sciatic foramen. 



(l) The branch of the sacral plexus to the obturator interims; (2} the 

 internal pudic nerve ; (3) the internal pudic vessels. 



\\7iat becomes of these structures on reentering the pelvis / 



