i I2 OUTLINES OF ANATOMY. 



Vastus Interims and Crureus: 

 Nerve-supply. Action. 



Relations of the vastus externus, crureus, and vastus interims. 

 Variations. 



The Inner Side of the Thigh. 



The adductor muscles, 379 ; Figs. 287-9-90. (377) 



Gracilis, 383; (381-2) 



Origin. Insertion. Structure. Nerve-supply. Action. Relations. 

 Adductor longus, 379 ; Fig. 289. (378-9-80) 



Origin. Insertion. Structure. Nerve-supply. Action. Relations. Variations. 



Divide the adductor longus just below its origin and turn the muscle downward and outward, expos- 

 ing the profunda or deep femoral artery. 



Profunda or deep femoral artery, 618-19. (607) 



Relations: Behind. In front. Externally. Internally. 

 Branches of the profunda : (a), (b), (c). 



(c) Perforating arteries of the profunda, 620. (608) 



Superior or first perforating ; crucial anastomosis. 

 Middle or second perforating. 

 Inferior or third perforating. 

 Fourth perforating. 



Profunda or deep femoral vein, 686. (672) 

 Pectineus, 370-1 ; Fig. 287. (370) 



Origin. Insertion. Structure. Nerve-supply. Action. Relations. Variations. 



Cut the pectineus at its origin and turn it downward and outward. 



Anterior branch of obturator nerve, 849. (830) 



Accessory obturator nerve, 850. (831-2) 



Internal circumflex artery; crucial anastomosis, 619-20. (607-8) 



Variations of the internal circumflex. 



Adductor brevis, 380-1-2 ; Fig. 289. (380) 



Origin. Insertion. Structure. Nerve-supply. Action. Relations. Variations. 



Cut the adductor brevis at its origin and turn downward and outward. 



Posterior branch of obturator nerve, 849-50. (831) 

 Adductor magnus, 382-3; Fig. 290. (380-1) 



Origin. Insertion. Structure. Nerve-supply. Action. Relations. Variations. 



Gluteal Region, 1216-17-19-20. (1192-3-5-6) 

 Bony landmarks. 

 Gluteus maximus. 

 Nerves and vessels : 



Superficial nerves, P. 1246; Fig. 791. (1222) 



Great sciatic nerve. 



Gluteal artery. 



Sciatic and pudic arteries. 



To expose the structures of the gluteal region : Make a median incision from the spine of the last lum- 

 bar vertebra to the tip of the coccyx, make a transverse incision from the same starting point to the 

 crest of the ilium and along the crest, also, a curved incision from the coccyx outward and downward 

 to the posterior median line of the thigh. Remove the skin over the gluteal muscles and from the upper 

 third of the thigh and expose the superficial fascia and nerves. 



Sacral and coccygeal nerves, 828. (808-9) 



External branches (see internal branches). 



Lower two sacral, and coccygeal nerves. 

 Lumbar nerves, 827-8. (808) 



External branches of upper three nerves. 

 Iliac branch of the ilio-hypogastric nerve, 848. (829) 

 Iliac branch of last thoracic nerve, 846. (826) 



