376 MUSCLES OF THE OS FEMORIS. 



3. Pectinalis, 



Arises, broad and fleshy, from the upper and anterior part of 

 the OS pubis or pectinis, immediately above the foramen thy- 

 roideum. 



Inserted into the anterior and upper part of the linea aspera 

 of the OS femoris, a httle below the trochanter minor, by a flat 

 and short tendon. 



Use. To bring the thigh upwards and inwards, and to give it a 

 desrree of rotation outwards. 



4. Triceps Adductor Femoris, 



Under this appellation are comprehended three distinct 

 muscles : 



a. Adductor Longus Femoris, 



Arises, by a strong roundish tendon, from the upper and 

 anterior part of the os pubis, and from the symphysis pubis, on 

 the inner side of the pectinalis. 



Inserted, tendinous, near the middle of the posterior part of the 

 linea aspera, being continued for some way down. 



b. Adductor Brevis Femoris, 



Arises, tendinous, from the os pubis near its joining with the 

 opposite OS pubis, below and behind the former. 



Inserted, tendinous and fleshy, into the inner and upper part 

 of the linea aspera, from a little below the trochanter minor, to 

 the beginning of the insertion of the adductor longus. 



c. Adductor Magnus Femoris, 



Arises, a little lower down than the former, near the symphysis 

 of the OS pubis, tendinous and fleshy from the tuberosity of the 

 OS ischium ; the fibres run outwards and downwards. 



Inserted into almost the whole length of the linea aspera ; 

 into a ridge above the internal condyle of the os femoris ; and, 

 by a roundish long tendon, into the upper part of that condyle. 



