THE MUSCLES OF THE LOWER LIMB. 



63' 



2. Tensor Fascia Lat^ (Figs. 600, 604). 

 Attachments.— The tensor fasciae latae, also termed the tensor vagincs femo- 

 ris, is a flat muscle which 



Fig. 604. 



Gluteus medius 



Anterior supe- 

 rior spine of 

 ilium 



Greater 



trochanter 



Gluteus 

 maximus 



Sartorius 



Tensor fasciae 

 latae, cut at 

 insertion into 

 fascia 



Rectus femoris 



arises from the crest of the 

 ilium, immediately behind 

 the anterior superior spine, 

 and passes downward and 

 slighdy backward to be 

 inserted into the upper 

 portion of the ilio-tibial 

 band of the fascia lata. 



Nerve-Supply. — By 

 the superior gluteal nerve 

 from the fourth and fifth 

 lumbar and first sacral 

 nerves. 



Action. — To tense the 

 fascia lata and at the same 

 time to flex the thigh and 

 rotate it slightly inward. 



3. Gluteus Medius 

 (Figs. 604, 609). 



Attachments. — The 



gluteus medius arises from 

 the outer surface of the 

 ilium, between the superior 

 and middle gluteal lines. 

 Its fibres pass downward, 

 converging to a tendon 

 which is inserted into the 

 lateral surface of the great 

 trochanter or the femur 

 near its summit. 



Nerve-Supply. — By 

 the superior gluteal nerve 

 from the fourth and fifth 

 lumbar and first sacral 

 nerves. 



Action. — To abduct 

 the thigh and by its 

 stronger anterior fibres to 

 rotate it inward. Acting 

 from below, to flex the 

 pelvis laterally. 



Relations. — The an- 

 terior portion of the mus- 

 cle is covered by the fascia 

 lata and the tensor fasciae 

 latae, the posterior portion 

 by the gluteus maximus. 

 Beneath it are the gluteus 

 minimus and the superior 

 gluteal vessels and nerve, 

 its tendon passing over that 



of the pyriformis near its Muscles of right thifjh, lateral aspect. 



insertion. 



A bursa (bursa trochantet ica m glutaei medii anterior) is interposed between the 



Biceps, long 



Vastus 

 externus 



Biceps, short head 



Tendon of quadriceps 

 extensor 



Ilio-tibial band, cut 



