138 ANATOMY IN A NUTSHELL. 



Insertion. -(Plate LXXIV.) — By common extensor Tendon into the 

 patella, an expansion being sent to capsule of knee-joint. 



A.< i ion. Extends leg and draws patella inward. 



N i i;\ e Suppli . Branches of anterior crural. 



Blood Supply. Femoral artery. 



Crurcus. Description. — Given with Vastus internus. 



Origin. (Plate XLIX.)— From front and outer aspect of shaft of femur 

 in its upper two-thirds and from the lower part of the external intermuscular 

 septum. 



Insertion.— (Plate LXXIV.) — Its fibers end in a superficial aponeurosis 

 which forms the deep part of the Quadriceps extensor tendon. 



A. tion. Extends leg and draws patella inward. 



Nerve Si pply. Branches of anterior crural. 



BLOOD Si PPLY. — Femoral artery. 



Subcrureus. Description. — This muscle may consist of several muscular 

 bundles, but it is a small muscle. It is most always distinct from the Crureus, 

 bu1 may be attached to it. 



< Origin. I Plate XLIV.) — Anterior surface of lower part of shaft of femur. 

 I\-i rtion. (Plate LXXIV.) — Upper part of eul de sac of capsular lig- 

 ament. 



A< tion.— Lifts capsule. 



\'i.k\ i. Supply. — Branches of anterior crural. 



BlOod Supply. — Femoral artery. 



Gracilis.— Description.— (Plates LX1V-LXV1II-LXXIV.)— This muscle 

 is broad above, narrow below, thin and flattened as a whole. Its fibers after 

 passing downward end in a rounded tendon, then passes behind the internal 

 condyle of femur to curve round the inner tuberosity of the tibia. It becomes 

 flattened before its insertion. It is the most superficial muscle in the Internal 

 Femora] Region. Its tendon which is just above that of the Semitendinosus 

 and below that of the Sartorius joins the latter. It is separated from the in- 

 ternal lateral ligament of the knee-joint by a synovial bursa which is common to 

 it and the Semitendinosus. 



< Origin. I Plate X F I II.) — Lower half of margin of symphysis and anterior 

 half of the pubic arch. 



Insertion. (Plate LI.)- Upper part of inner surface of shaft of tibia be- 

 low the tuberosity. 



A< tion. Assists Sartorius in flexing leg; also adducts thigh. 



Nerve Si pply. Third and fourth lumbar through the obturator nerve. 



Blood Si pply. Obturator and femoral arteries. 



Pectineus. Description. (Plates LXIV-LXVIII-LXXIV.)— This mus- 

 cle which is situated at the anterior part of the upper and inner aspect of the 

 thigh is flat and quadrilateral. 



Origin. (Plate XLIII.)— (1) Uio-pectineaJ line; (2) surface of bone in 

 front of it scia covering anterior surface of muscle. 



Insertion.- (Plate XLVIII.) Rough line between lesser trochanter and 

 lines aspera. 



