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Periodic alternating nystagmus.

L DE Silva, B P Cooper, J G McLeod

Proceedings of the Australian Association of Neurologists

|January 1, 1975

Summary

This summary is machine-generated.

Periodic alternating nystagmus, a type of jerk nystagmus, is characterized by direction changes at regular intervals. This condition may signal a lesion in the upper medulla.

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Area of Science:

Neurology
Ophthalmology

Background:

Periodic alternating nystagmus (PAN) is a rare subtype of nystagmus.
Its characteristic feature is the regular alternation of the direction of the nystagmus beat.

Observation:

A typical case of periodic alternating nystagmus is presented.
The nystagmus observed was horizontal or horizontal-rotary jerk nystagmus.

Findings:

The primary finding is the characteristic alternation in direction at regular intervals.
The study suggests that periodic alternating nystagmus may not be as rare as previously thought.

Implications:

Periodic alternating nystagmus could indicate a lesion in the upper part of the medulla.
Increased recognition of PAN may lead to earlier diagnosis and improved patient outcomes.