LIGAMENTS OF HIP-JOINT. 



171 



Dissection (fig. 65, p. 173). The capsular ligament is now to 

 be divided over the prominence of the head of the femur, and this 

 bone being disarticulated but not detached, the cotyloid and inter- 

 articular ligaments inside it will appear. The interarticular or round 

 ligament is attached to the acetabulum by two pieces ; and to bring 

 these into view, the synovial membrane and areolar tissue must be 

 removed. The transverse ligament over the notch is also to be defined. 



The cotyloid ligament is a narrow band of fibro-caitilage, which is 

 fixed to the margin of the acetabulum, and is prolonged across the 

 notch below, so as to form part of the transverse ligament. Its 

 fibres are not continued around the acetabulum, but are fixed to the 

 margin of the cavity, and cross one another in the band. It is 



Cut open 

 the capsule. 



Define round 

 ligament. 



Cotyloid 

 ligament 



attached 



round 



acetabulum; 



FIG. 64. 



a. Longitudinal fibres. 



b. Zonular band. 



HINPER PART OF THE CAPSULE OF THE HIP-JOINT. 



c. Thin piece attached to the neck 

 of the femur about half-way down. 



thickest at its attachment to the bone, and becomes gradually thinner 

 towards the free margin, where it is applied to the head of the femur. 



This ligament fills up the hollows in the rim of the acetabulum, use. 

 deepens the socket for the femur, and makes a flexible margin to 

 the cavity, which can yield slightly when the neck of the femur is 

 pressed against it. 



The transverse ligament bridges across the notch in the lower and Transverse 

 inner part of the margin of the acetabulum. It consists partly of 1J 

 deep special fibres which are attached to the margins of the 

 notch, and partly of a superficial bundle from the cotyloid liga- 

 ment Beneath it is an aperture by which vessels and nerves 



