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Traumatic Myopathies in Cattle

By

Geof W. Smith

, DVM, PhD, Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University

Last full review/revision Mar 2021 | Content last modified Mar 2021

Muscle Crush Syndrome of Cattle

Muscle damage commonly accompanies bovine secondary recumbency Bovine Secondary Recumbency read more . Tearing of adductor or semitendinosus/membranosus muscles may arise as animals weakened by hypocalcemia attempt to rise. Additionally, the weight of a recumbent animal on dependent muscle groups creates significant increases in intramuscular pressure, resulting in decreased perfusion and ischemia of muscle and nerve. Muscle trauma leads to edema and inflammation, both of which may exacerbate local tissue degenerative changes. Mild increases in serum CK can be expected in recumbent cows, but increases >5,000 U/L usually indicate traumatic muscle damage. Treatment requires correcting the underlying cause of recumbency, fluid therapy if renal damage is evident, NSAIDs, good nursing care, adequate footing and bedding, and lifting or rolling the animal several times a day. Aquatherapy using float tanks for cattle also appears to help relieve pressure on muscle groups.

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Musculoskeletal
In all animals, the motor unit of skeletal muscle consists of the motor neuron, the neuromuscular junction, and muscle fibers. Muscle dysfunction—such as ataxia, paresis, or paralysis—most commonly originates in which of the following locations?
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