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Eye Fluttering During Photic Stimulation

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1 Eye Fluttering During Photic Stimulation
Eye Fluttering During Photic Stimulation. An 8-year-old girl with recurrent headaches and numbness of arms. EEG shows spikes of muscle origin time-locked to the flash stimuli, which is confined exclusively to the prefrontal electrodes (Fp1, Fp2). This so-called “photomyoclonic response” occurs in 0.1% of normal population and 1% of patients with epilepsy. They are most prominent in the frontal regions as a result of orbicularis oculi and frontalis muscle twitching during eye closure and stops with flash. Immediate cessation of the response at the end of stimulation and prominent electromyographic activity help to distinguish this photomyoclonic response from photoparoxysmal response. Photomyoclonic response is considered a normal variant, although it can coexist with photoparoxysmal response or rarely progress to GTCS. In this case, the involvement was limited to only frontalis and orbicularis oculi and did not involve temporalis muscles. Source: Artifacts, Atlas of Pediatric EEG Citation: Laoprasert P. Atlas of Pediatric EEG; 2011 Available at: Accessed: November 04, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved

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