Age: 20+; dissociative seizures

Have a look at the following few pages, which follow one another. These occur at the time of a dissociative seizure. What do you make of the 9-10 Hz alpha frequencies over the frontal regions? Do you think that these represent:

1. Eye movements
2. Frontal alpha rhythms
3. An epileptic seizure
4. Electrode artifact

5. Rhythmic movement artefact

 The following pages represent a second seizure, characterised by a feeling of disassociation:

up

Here is another seizure:

Believe it or not, but the above alpha frequencies at FP1-FP2 represent rapid movements of the eyelids; eyelid flutter. Notice that these are at FP1 and FP2 and are disrupted by large eyeblinks. There appears to be an evolution of the waves at times, but if you counted them, you may notice that these are largely unchanged in frequency. Finally, the video demonstrates that this rapid movement of the eyelids on video starts and stops at the same time as these waves. The sharply contoured wave immediately followed by a slow wave (arrowed) is not a "post-ictal spike-and-wave". It is a "pseudo-spike-and-wave", consequent upon eye movements.

Here is another example.

https://nsj.org.sa/content/nsj/15/2/134.full.pdf