ARTICULA TIONS. LIGAMENTS. 



439 



3. Technical Name. Femoro-acetabular. 



4. Osteological Units. Femur and os innominatum. 



5. Subdivisional Parts. Ilium, ischium, pubes, and femoral head. 



6. Articular Surfaces. Named according to the rule. 



7. Basis. A capsule lined by synovial membrane. 



8. Local Subdivisions. Ilio-femoral, ischio-femoral, pectineo-femoral. 



9. Strengthening' Bands. Tendino-trochanteric band. 



10. Incorporated Tendon of the Pectineus Muscle (ligamentum teres). 



1 1. Bony Limitations. The brim and circumference of acetabulum. 



12. Nerve-supply. Anterior crural, obturator, great sciatic, sacral plexus. 



13. Blood-supply. Obturator, circumflex, gluteal and sciatic arteries. 



14. Ligamentous Muscles. (i) Sartorius ; (2) rectus femoris ; (3) ilio-psoas ; 



Tendon of rectus pulled up 



Tendino-trochanteric band passing 

 between rectus and vastus externus 



Placed on the weak spot of capsule, 

 which is sometimes perforated to 

 allow the bursa under psoas to com- 

 municate with joint 



Ilio-femoral band 



Pectineo-femoral band 



FIG. 308. ANTERIOR VIEW OK THE CAPSULE OK THE HIP-JOINT. 



(4) pectineus ; (5) gracilis ; (6) adductors longus, brevis, and magnus ; (7) the 

 glutei maximus, medius, and minimus ; (8) the obturators internus and ex- 

 ternus ; (9) the gemelli, superior and inferior; (10) the tensor vaginae femoris ; 

 (i i)'the semitendinosus, biceps, and semimembranosus. 



Name the ligaments of the hip. 



(i) The capsular ligament, the basis of the joint ; (2) the transverse ligament ; 

 (3) the ligamentum teres, an interarticular structure ; (4) the cotyloid, a circum- 

 ferential cartilage. 



What can you say of the capsular ligament / 



It is one of the strongest ligaments in the body. It is attached to the an- 

 terior intertrochanteric line in front ; posteriorly, it is attached to the back of the 

 neck, one-half of an inch above the posterior intertrochanteric line. 



