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Atonic Seizure?


My little sister (18 years old) has had trouble with fainting in the past like 8 months. Out of no where she will just faint and fall to the ground, totally unconscious. Shes usually passed out for a couple minutes and then wakes up and feels totally fine. Right before she does this, she looks sort of out of it. She says she cant tell when its coming on but those around her can tell something's off. 

The most recent one happened a couple days ago in the car. I looked over and she looked very serious and tired. I asked her if she was alright and she nodded and said yes very quietly. Then just a couple seconds later her eyes closed and her head just lulled to the side. My mom got out of the car and shook her a little bit and she woke up. She was probably down for a little less than two minutes.

This is the first time I ever actually saw it happen and it was so very scary.

We have a history of epilepsy in our family. Both our older brother and our aunt have a history of it, though they had the type of seizure where you convulse I'm pretty sure.

I looked it up and theres something called an Atonic Seizure which seems to fit, but it seems to be more common in young children.

I don't know if I'm even going down the right track here but if anyone knows anything or they think I might be, I would be super grateful for any feedback at all. I have no idea what to do. She is my baby sister and I love her so much and seeing her like that scared me beyond belief. 

Thank you for any help at all. <3

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