DISEASES OP ARTICULATIONS 215 



Articular Contracture. 



What do you understand by articular contractv/re ? 



An incomplete anchylosis — that is, a permanent impair- 

 ment of joint mobility — accompanied by fixation of the joint 

 at an abnormal angle. 



WhM are the causes of articular contractures ? 



They may be acquired and the result of diseases of ten- 

 dons, muscles, nerves, skin or joints, or they are congenital, in 

 which case the creature is either born with them or predis- 

 posed to them. 



Name the various forms of joint contractv/res. 



(1) Arthrogenous contractures, (2) tendogenous, (3) myo- 

 genous, (4) neurogenous, (5) cicatricial, (6) congenital. 



What are arthrogenous contractures 9 



In these, pathologic lesions in or close to the joint hinder 

 free mobility. 



Give examples of arthrogenous contracture. 



In the earlier stages of arthritis deformans, as in articular 

 ringbone, exostoses|about the joint, loose bodies in the joint. 



Which is the most common example of arthrogenous contrac- 

 tii/re in the horse ? 



That due to articular arthritis. 

 What is a tendogenous contracture ? 



In this form the mobility of a joint is limited by adhe- 

 sions and shortening of flexor tendons. 

 Give an example of tendogenous contractwre. 



The one most commonly seen is met with in the foreleg of 

 the horse, where the mobility of the phalangeal articulations 



