THE ILIAC REGION 



4. Posterior Femoral Region. 



503 



. ,, f Biceps femoris. 



. * \ Semitendinosus. 

 es ' ( Semimembranosus. 



IV. LEG. 



5. Anterior Tibiofibular Region. 



Tibialis anticus. 

 Extensor proprius hallucis. 

 Extensor longus digitorum. 

 Peroneus tertius. 



6. Posterior Tibiofibular Region. 

 Superficial Layer. 



Gastrocnemius. 



Soleus. 



Plantaris. 



Deep Layer. 



Popliteus. 



Flexor longus hallucis. 

 Flexor longus digitorum. 

 Tibialis posticus. 



7. Fibular Region. 



Peroneus longus. 

 Peroneus brevis. 





V. FOOT. 



8. Dorsal Region. 

 Extensor brevis digitorum. 



9. Plantar Region. 

 First Layer. 



Abductor hallucis. 

 Flexor brevis digitorum. 

 Abductor minimi digiti. 



Second Layer. 



Flexor accessorius. 

 Lumbricales. 



Third Layer. 



Flexor brevis hallucis. 

 Adductor obliquus hallucis. 

 Flexor brevis minimi digiti. 

 Adductor transversus hallucis. 



Fourth Layer. 

 Interossei. 



I. MUSCLES AND FASCIA OF THE ILIAC REGION. 



Psoas magnus. %/ Psoas parvus. ^ Iliacus. 



Dissection. Xo detailed description is required for the dissection of these muscles. On 

 the removal of the viscera from the abdomen they are exposed, covered by the peritoneum and 

 a thin layer of fascia, the iliac fascia. 



The iliac fascia (fascia iliaca) is the aponeurotic layer which lines the back 

 part of the abdominal cavity, and covers the Psoas and Iliacus muscles throughout 

 their whole extent. It is thin above, and becomes gradually thicker below as it 

 approaches the femoral arch. 



The portion covering the Psoas is thickened, above, to form the ligamentum 

 arcuatum internum; internally it is attached, by a series of arched processes, to the 

 intervertebral substances, to the prominent margins of the bodies of the vertebrae, 

 and to the upper part of the sacrum, the intervals so left, opposite the constricted 

 portions of the bodies, transmitting the lumbar arteries and veins and the fila- 

 ments of the sympathetic cord. Externally, above the crest of the ilium, this 

 portion of the iliac fascia is continuous with the anterior lamella of the lumbar 

 fascia covering the front of the Quadratus lumborum, but below the crest of the 

 ilium it is continuous with the fascia covering the Iliacus. 



