About The Medical Condition Nystagmus, Periodic Alternating
Find the definition of the medical term Nystagmus, Periodic Alternating. Nystagmus, Periodic Alternating defined and explained for easy understanding at the Medical Conditions from ClusterMed.info.
Nystagmus, Periodic Alternating
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What's The Definition Of The Medical Condition Nystagmus, Periodic Alternating?
Involuntary movements of the eye that are divided into two types, jerk and pendular. Jerk nystagmus has a slow phase in one direction followed by a corrective fast phase in the opposite direction, and is usually caused by central or peripheral vestibular dysfunction. Pendular nystagmus features oscillations that are of equal velocity in both directions and this condition is often associated with visual loss early in life. (Adams et al., Principles of Neurology, 6th ed, p272)
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