THE MUSCULAR SYSTEM. 



159 



ADDUCTOR BREVIS. Origin, from the outer aspect of the 

 descending ramus of the pubes, between obturator externus and 

 the gracilis; insertion, into the upper part of the linea aspera; 

 action, adducts the thigh; nerves, branches of the obturator. 



ADDUCTOR MAGNUS. Origin, from 

 the tuberosity of the ischium, the as- 

 cending ramus of the ischium, and 

 from the descending ramus of the 

 pubes ; insertion, into the rough line 

 leading to the linea aspera from the 

 great trochanter to the inner side of 

 the glutens maximus and into the 

 adductor tubercle above the inner con- 

 dyle of the femur (vide page 64) ; action, 

 adducts the thigh ; nerves, the obtura- 

 tor and a branch from the great sciatic. 



GLUTEUS MAXIMUS. Origin, from 

 the superior curved line of the ilium, 

 the posterior aspect of the last segment 

 of the sacrum, the border of the coccyx, 

 and the surface of the great sacro- 

 sciatic and posterior sacro-iliac liga- 

 ments ; insertion, into the rough line 

 leading to the linea aspera from the 

 great trochanter, between the adductor 

 magnus and the vastus externus, and 

 into the fascia lata ; action, it is a ten- 

 sor of the fascia lata, and an external 

 rotator and extensor of the thigh ; 

 'itt'rrcs, the inferior gluteal and a branch 

 from the sacral plexus. 



GLUTEUS MKDIUS. Origin, from 

 the outer lip of the crest and the outer 

 aspect of the ilium, between the middle 

 and superior curved lines, and from 

 lli< i gluteal aponeurosis ; insertion, into 

 the oblique line on the outer surface of 

 the great trochanter ; action, rotates 

 the thigh outward ; nerve, from the 

 superior gluteal 



GLUTEUS MINIMUS. Origin, from the border of the great 

 s;icn>-sci;i(ic notch ;md between the inferior and middle curved 

 lines of the outer aspect of the ilium; insertion, into a depression 

 on the front border of the great trochanter; action, rotates the 

 thigh inward; nerve, superior gluteal. 



FIG. 100. 



Anterior femoral re- 

 gion: 4, tensor vaginae 

 femoris; 5, sartorius; 6, 

 rectus; 7, vastus exter- 

 nus; 8, vastus internus; 

 10, iliacus; 11, psoas; 12, 

 pectineus; 13, adductor 

 longus; 14, adductor mag- 

 nus; 15, gracilis. 



