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Electrodiagnostic evaluation of hypomagnesemia in sheep
Journal of Animal Science
|March 1, 1980
Summary
Hypomagnesemia in sheep did not affect electromyography (EMG) or nerve conduction velocity (NCV) despite significant plasma magnesium depletion. Electrophysiological studies in hypomagnesemic sheep remained normal.
Area of Science:
- Veterinary Neurology
- Animal Physiology
- Electrophysiology
Background:
- Hypomagnesemia, a condition of low magnesium, can impact neurological function.
- Sheep are a relevant model for studying metabolic and neurological disorders.
Purpose of the Study:
- To electrophysiologically characterize the effects of hypomagnesemia in sheep.
- To investigate the impact of magnesium deficiency on nerve and muscle function.
Main Methods:
- Adult wethers were fed magnesium-deficient, calcium-deficient, or combined deficient diets for six weeks.
- Weekly blood samples analyzed plasma calcium, magnesium, and potassium.
- Electromyography (EMG), nerve conduction velocity (NCV), and strength-duration (S-D) curves were measured.
- Cerebrospinal fluid (CSF) was analyzed for electrolytes at study's end.
Main Results:
- Plasma magnesium levels significantly decreased in sheep fed magnesium-deficient diets.
- Electromyography (EMG) and nerve conduction velocity (NCV) remained normal in hypomagnesemic sheep.
- Muscle-evoked potentials and strength-duration curves showed no significant alterations.
Conclusions:
- Electrophysiological parameters like EMG and NCV are not significantly altered by hypomagnesemia in sheep.
- Muscle excitability and nerve conduction are preserved despite low plasma magnesium levels.