CHAPTER XV. 



PARTICULAR LAMENESSES — continued. 



HIP-JOINT LAMENESS — SPRAIN OF QLITEAL TENDONS, OR TROOIIAX- 

 TERIC LAMENESS — SPRAIN AND ATROPHY OF CRURAL MUSCLES — 

 STIFLE-JOINT LAMENESS — LACERATION OF PLEXOR METATARSI 

 MUSCLE. 



HiP-JoiNT lameness is of very rare occurrence, except as a result 

 of the scrofulous diathesis in young animals, and of rheumatism 

 in those of mature age. Sprain of the hip-joint is very rare 

 indeed, but it is possible ; and "when inflammation of the joint 

 occurs from this cause, the same pathological changes are 

 observed as in other joints, namely, redness of the synovial 

 membrane, exudation into the cavity, and if not arrested, idcora- 

 tion of the articular cartilage and laminal layer of the bones. 

 In rheumatoid disease, the tendency is to the formation of the 

 porcellaneous deposit within, and bony vegetations around, the 

 articulations. 



Lameness in the hip, however, is not at all an unfrequent 

 occurrence ; still its seat is not the joint, but the head of tha 

 trochanter major of the lemur. 



" The trochanter major is a very large eminence which loolcs 

 outwc.rds and upwards, and presents, posteriorly, a prominent 

 part, termed the summit, which stands a little higher than the 

 articular head (of the femur), and "gives attachment to one of the 

 heads of the gluteus maximus; and anteriorly the convexity,. 

 which is rounded and covered externally by cartilage of incrus- 

 tation, which forms a bursa, over which plays the other tendoa 

 of the gluteus maximus, which becomes inserted into the ridga 

 Just below."-:— (Strangew AYS* AncUomy.) 



The above quotation will enable the reader to understand that 

 the trochanter major is a very important protuberance ; that it 



