PRACTICAL ANATOMY. 



What is tlic special name for the tu<o inches of the greater sacro-sciatic ligament 

 that is prolonged on to (lie inner margin of the ascending minus of the ischium / 



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. 



\Vliat 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. 



Xante 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 sacro-iliac 

 ligament 



Anterior Baero-iliac 



ligament 



Inferior sacro-iliac 

 ligament 



Small sacro-sciatic 

 ligament 



Great sacro-sciatic 

 ligament 



Fit;. 329. VERTICAL ANTEKO POSTERIOR SECTION OK THE PELVIS. 



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

 converts the greater sacro-sciatic notch into a foramen. 



Xamc structures transmitted by the greater sacro-sciatic foramen. 



(i) The pyriformis muscle, above which pass out the gluteal nerve and 

 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. 



Name all the structures that leave the pelvis through the greater sacro-sciatic 

 foramen, cross the iscliial spine, and rcenter the pelvis through the lesser sacro- 

 sciatic foramen. 



(i) The branch of the sacral plexus to the obturator internus ; (2) the 

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



What becomes of these structures on reoitering tlie pelvis .' 



