Key result
Electromyography and histology reveal continuous muscle activity consistent with neuromyotonia in a Quarter Horse.
Case Report (n=1)
This case report describes the clinical, electromyographic, and histological findings consistent with neuromyotonia in a young Quarter Horse.
Neuromyotonia merits consideration in young horses with stiffness and myokymia; this case report leaves open the need for confirmatory studies.
This article describes the clinical and electromyographic findings of neuromyotonia in a 19-month-old male crossbred Quarter Horse that presented with stiffness and muscle asymmetry in the hind limbs as well as sacrococcygeal, paravertebral, and gluteal myokymia. An electromyographic study showed spontaneous continuous muscle fiber activity with high-frequency discharges, fibrillations, positive sharp waves, fasciculation potentials, and complex repetitive discharges. Histological examination of the gluteal muscle showed a mixed neurogenic and myopathic pattern. The findings are consistent with neuromyotonia.
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Zakia et al. (2018) conducted a case report in Neuromyotonia (n=1). Electromyographic and histological examination of a 19-month-old male Quarter Horse with stiffness and myokymia revealed spontaneous continuous muscle fiber activity consistent with neuromyotonia.
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