Reciprocal apparatus dysfunction as a cause of severe hind limb lameness in a horse. 1991

M J Reeves, and G W Trotter
Department of Clinical Sciences, College of Veterinary Medicine, Colorado State University, Fort Collins 80523.

A 2-year-old Appaloosa mare was admitted because of acute, severe hind limb lameness (grade 4 of 5). The hock could be flexed or extended without influencing the position of the stifle joint, and the fetlock and proximal interphalangeal joints could be extended while the hock was maintained in flexion. The diagnosis was functional loss of the reciprocal apparatus. The differential diagnoses for functional loss of the reciprocal apparatus include disruption of the common calcaneal tendon, the gastrocnemius muscle, the peroneus tertius, or the superficial digital flexor muscle. In this horse, the diagnosis was disruption of the superficial digital flexor muscle. The horse made an excellent recovery following 5 months of stall confinement.

UI MeSH Term Description Entries
D007794 Lameness, Animal A departure from the normal gait in animals. Gait Disorders, Animal,Animal Gait Disorder,Animal Gait Disorders,Animal Lameness,Animal Lamenesses,Disorder, Animal Gait,Disorders, Animal Gait,Gait Disorder, Animal,Lamenesses, Animal
D009132 Muscles Contractile tissue that produces movement in animals. Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D012146 Rest Freedom from activity. Rests
D005260 Female Females
D006734 Horse Diseases Diseases of domestic and wild horses of the species Equus caballus. Equine Diseases,Disease, Equine,Disease, Horse,Diseases, Equine,Diseases, Horse,Equine Disease,Horse Disease
D006736 Horses Large, hoofed mammals of the family EQUIDAE. Horses are active day and night with most of the day spent seeking and consuming food. Feeding peaks occur in the early morning and late afternoon, and there are several daily periods of rest. Equus caballus,Equus przewalskii,Horse, Domestic,Domestic Horse,Domestic Horses,Horse,Horses, Domestic
D000208 Acute Disease Disease having a short and relatively severe course. Acute Diseases,Disease, Acute,Diseases, Acute
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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