title: Disruption of the caudal component of the reciprocal apparatus in two horses.
abstract: Two horses became acutely lame following a fall during strenuous exercise and were diagnosed as having disruption of the caudal component of the reciprocal apparatus. Clinical signs consisted of lameness of the right pelvic limb, characterized by flexion of the hock and simultaneous extension of the stifle. Radiography revealed an avulsion fracture from the supracondylar tuberosity and fossa of the distal portion of the femur in one horse. Clinical and radiographic findings indicated avulsion of the lateral origin of the gastrocnemius and superficial digital flexor muscles. Treatment consisted of stall rest, limb immobilization, and phenylbutazone administration. One horse recovered to soundness and the other deteriorated and was euthanatized.
authors.affiliation: Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge 70803.
authors.forename: R S
authors.initials: RS
authors.lastname: Shoemaker
authors.forename: G S
authors.initials: GS
authors.lastname: Martin
authors.forename: D J
authors.initials: DJ
authors.lastname: Hillmann
authors.forename: P F
authors.initials: PF
authors.lastname: Haynes
authors.forename: J R
authors.initials: JR
authors.lastname: McClure
authors.forename: H L
authors.initials: HL
authors.lastname: Schneiter
mesh_terms: D000818:Animals; D005260:Female; D006734:Horse Diseases / Q000209:etiology*; D006736:Horses / Q000293:injuries*; D007794:Lameness, Animal / Q000209:etiology*; D008297:Male; D009132:Muscles / Q000293:injuries*; D012421:Rupture