Text Appearing Before Image:
' Text Appearing After Image: A, Extensor Pedis Tendon. B, Os .Suffraginis or First Phalanx.C, Os Coronse. D, Ring-bone. E, Os Pedis. Fig. 314. —High RingBone Causes.—Horses with upright pasterns, and animals with pasterns ofundue length, are specially predispo.sed to it. The exciting causes arechiefly blows, concussion, and sprains to the joints. Fracture of thepastern is invariably followed by ring-bone in the form of a reiDarativecallus. It is also induced by the too early and severe work imposedon young, undeveloped animals, and especially when attended with badshoeing, as where the heels are thrown up too high and an upright posi-tion given to the limb. Symptoms. ^—A hard, unyielding enlargement, more or less promi-nent and extensive, is the characteristic indication of the disease. It passesacross the front of one or the other of the pastern bones, and sometimes 206 HEALTH AND DISEASE encroaches on the posterior surface. The degree and character of thelameness will vary with the position of the growth.
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