Post Rotatory Nystagmus (PRN) is a medical condition characterized by rapid, involuntary, rhythmic eye movements that occur after the cessation of a rotational or spinning movement. This type of nystagmus is classified as a vestibular disorder, as it is primarily caused by a dysfunction in the vestibular system, which controls balance and spatial orientation.
When a person experiences a rotational motion, such as spinning in a chair or during specific exercises, the fluid in the inner ear is set into motion, stimulating the vestibular system. After the rotational movement stops, the vestibular system may continue to send signals to the brain, resulting in the characteristic nystagmus movements of the eyes. The eyes tend to move back and forth, oscillating in opposite directions or in a circular pattern.
These eye movements can lead to various symptoms, including dizziness, vertigo, imbalance, and difficulty focusing. The severity and duration of PRN can vary, ranging from mild, transient episodes to more persistent and intense symptoms.
Diagnosing post rotatory nystagmus involves a thorough evaluation of a patient's medical history, a physical examination, and specialized tests such as electronystagmography (ENG) or videonystagmography (VNG). Treatment options for PRN may include vestibular rehabilitation exercises, medication to alleviate symptoms, or surgical intervention in severe cases.
Overall, post rotatory nystagmus is a condition characterized by involuntary eye movements that occur following rotational movements. Proper diagnosis and appropriate management can help alleviate symptoms and improve the quality of life for those affected.
