About The Medical Condition Periodic Alternating Nystagmus
Find the definition of the medical term Periodic Alternating Nystagmus. Periodic Alternating Nystagmus defined and explained for easy understanding at the Medical Conditions from ClusterMed.info.
Periodic Alternating Nystagmus
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What's The Definition Of The Medical Condition Periodic Alternating Nystagmus?
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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