Chap. 13-] I l6 5 1 . 



CHAP. XIII. 



MUSCLES OF THE INFERIOR EXTREMITIES. 

 Mufcles of the Thigh. Of the Leg. Of the foot and Toes. 



AS the two fides of the trunk of the body corre- 

 fpond, a defcrip.tion of one fide is to be under- 

 llood as applying equally to both. In the fame man- 

 ner the parts of the extremities have their fellows on 

 the oppofite fide. 



The mnfcles which belong to the thigh, and are fitn- 

 .ated at the anterior part of the pelvis, are, 



The pfoas magnus, 7 i j / -L j 



_. .V \ already defcnbed. 



The iliacus mternus s } 



The pectinalis arifes from the upper and anterior 

 part of the os pubis, immediately above the foramen 

 thyroideum. It is inferted into the anterior and upper 

 part of the Knea afpera of the os femoris, a little below 

 the trochanter minor. Its ufe is to draw the thigh 

 upwards and inwards, and to roll it in .fbme degree 

 outwards. 



The triceps adductor femoris arifes by three diflinct 

 heads from the ofia pubis, and is inferted into almoft 

 the whole length of the linea afpera, into a ridge above 

 the internal condyl of the os femoris and into the up- 

 per part of that condyl. The ufe of this extenfive 

 mufcle is, as the name exprefTes, to draw the thighs to- 

 gether ; it alfo at the fame time tends to move them 

 upwards and to roll the thigh outwards. 



The obturator externus furrounds the foramen thy- 

 roideum, and alfo rifes from the membrane which fills 

 yp that foramen, and from the adjacent parts of the os 

 M ,3 pubis 



