LIGAMENTS OF HIP JOINT. 



601 



fixed, it will prop the pelvis. The outer edge (e) (ilio-trochanteric band) 

 extends from the hip bone opposite the outer head of the rectus, to the 

 upper and fore part of the great trochanter and neck of the femur; its use 

 is to check adduction of the femur. The inner edge (b) (pubio-femoral 

 band) is attached superiorly to the prominent pubic portion of the hip 

 bone inside the acetabulum, and inferiorly to a roughened surface at the 

 lower part of the neck of the femur on a level with, and in front of, the 

 small trochanter : this band controls the abductory movement of the joint. 



a. o 

 



HINDER PART OF THK HIP-JOINT CAPSULE. 



a. Longitudinal fibres. 

 6. Transverse band. 



c. Thin piece attached to the neck of the femur 

 about half way down. 



At the back of the capsule close to the neck of the femur is a band of 

 transverse fibres (fig. 205, 6), about as wide as the little finger, which 

 arches like a collar over the neck of the bone. By its lower edge it is 

 united to the cervix femoris by a thin layer (c) of fibrous tissue and syno- 

 vial membrane ; at the upper edge it is joined by the longitudinal capsular 

 fibres (). It gives insertion to the longitudinal fibres of the capsule, and 

 prevents that restriction of the swinging movement which would result 

 from their insertion into the hinder part of the neck. 



Posteriorly the joint is covered by the external rotator muscles ; and 

 anteriorly by the psoas and iliacus, a bursa being between it and them. 

 Above is the gluteus minimus, whose tendon is united with the upper and 

 outer band of the capsule ; and below is the obturator externus. 



Dissection (fig. 206). The capsular ligament is to be now divided over 

 the prominence of the head of the femur, and this bone being disarticu- 

 lated but not detached, the cotyloid and interarticular ligaments inside it 

 \v:ll appear. 



The interarfeicular or round ligament is attached to the acetabulum by 



