. A treatise on surgical therapeutics of domestic animals. Veterinary surgery; Therapeutics, Surgical. SPRAINS. 521 lit Already in 1852, Meyer attributed the cramp of solipeds and bovines to the displacement upwards of the patella; for him, this bone became fixed on the internal border of the femoral trochlea, where it was held by the Internal and median tibio-patellar ligaments. It is the theory advocated by Bassi in Italy, Chuchu in France, and to-day admitted without discussion. The slight deviation of the patella is due, not to a luxation of that bone, but to the fact that the in- te
. A treatise on surgical therapeutics of domestic animals. Veterinary surgery; Therapeutics, Surgical. SPRAINS. 521 lit Already in 1852, Meyer attributed the cramp of solipeds and bovines to the displacement upwards of the patella; for him, this bone became fixed on the internal border of the femoral trochlea, where it was held by the Internal and median tibio-patellar ligaments. It is the theory advocated by Bassi in Italy, Chuchu in France, and to-day admitted without discussion. The slight deviation of the patella is due, not to a luxation of that bone, but to the fact that the in- ternal border of the trochlea being higher and thicker than the external, the patella is somewhat thrown outwards. But how can the patella as- sume that position and keep it ? What power holds it there ? Practice teaches that this ac- cident is principally met with in colts, in animals recently put to work, in weak and anaemic subjects. It is thus that it manifests itself during the convalescence of some serious diseases (pneumonia, typhoid fever). A special conformation of the trochlea, specially of the kind of plate form which ends at its upper extremity; the disappearance of the fatty cushions situated under the tibio-patellar liga- ments and above the trochlea, under the insertion of the triceps cruralis ; the violent or incoordinated contractions of the muscles; the dry condition of the joint; all those are the causes of the accident. The hooked condition is kept up by the stretching of the internal and middle tibio-patellar ligaments, of the first one principally. Violet has erroneously attributed it to a contraction of the patellar muscles. Submit the young subjects to a methodical training, and give a repair- ing diet to those weakened by serious or long disease; such are the two principal prophylactic measures. The accident exists; the patella must be returned to its place. A. Fig. 112.—Stifle joint, , internal border of the femoral trochlea; , internal pat
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