Optokinetic tests are part of vestibular testing, specifically videonystagmography (VNG). Let me break it down for you:
What Is VNG?
VNG stands for videonystagmography. It’s a diagnostic test used to evaluate the function of the vestibular system (inner ear and associated pathways).
The test involves recording eye movements while the patient performs specific tasks.
Optokinetic Testing (OKN):
Optokinetic tests assess the patient’s ability to track a moving visual stimulus (usually a pattern of stripes or dots) with their eyes.
During the test, the patient sits still while the stimulus moves across their field of vision.
The examiner observes eye movements to determine if there are any central (brain-related) lesions affecting the patient’s ability to respond reflexively to the moving target.
Optokinetics are often combined with other VNG tests like smooth pursuit, saccades, and gaze tests to provide a comprehensive assessment of central vestibular function.
Clinical Application:
Optokinetic testing can help identify central vestibular disorders, such as those related to brainstem or cerebellar lesions.
It complements other VNG tests and contributes to a more accurate diagnosis.
Remember, VNG testing is safe, painless, and typically performed in an audiologist's clinic
If you have any more questions or need further information, feel free to ask! 😊
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