Figure 13.4. Samples from video EEG to illustrate the differentiation between eye-closure (top) and eyes-closed (bottom) abnormalities.

Figure 13.4

Samples from video EEG to illustrate the differentiation between eye-closure (top) and eyes-closed (bottom) abnormalities.

Top: Eye closure-related abnormalities in a patient with Jeavons syndrome.130 High amplitude generalised discharges occur within 1–3 s after closing the eyes in a lit room. These are of brief duration, do not continue in the resting period while the eyes are closed and are totally inhibited in complete darkness.

Bottom: Eyes closed-related abnormalities in a woman who probably has cryptogenic generalised epilepsy and seizures related to FOS (case report in refs 39;131). The EEG paroxysms last as long as the eyes are closed. They are abruptly inhibited when the eyes are opened. The responses to fixation off and on were similar irrespective of the means by which they were achieved (eyes closed, darkness, +10 spherical lenses, Ganzfeld stimulation). The best practical means for testing FOS is with underwater goggles covered with opaque tape.

From: Chapter 13, Reflex Seizures and Reflex Epilepsies

Cover of The Epilepsies
The Epilepsies: Seizures, Syndromes and Management.
Panayiotopoulos CP.
Oxfordshire (UK): Bladon Medical Publishing; 2005.
Copyright © 2005, Bladon Medical Publishing, an imprint of Springer Science+Business Media.

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