I have had some infrequent 'attacks' and I have no idea what it is. The first time it happened I went to hospital but they couldn't find anything.
It happens very suddenly - there is no warning. I lose sense of what direction is up and what is down. It feels like the room or street is tipping (not spinning - it is more like the tipping I would expect from a severe earthquake).
I collapse to the ground and it lasts for a few seconds.
It is difficult to tell, but I think I lose control of my muscles. It happened today when I was sitting on the bus: my head tipped over to one side and I couldn't move for a few seconds while it lasted.
It has happened 4 times in my life. One time when I was standing, once when I was walking, and twice when I was sitting.
I was not under the influence of drugs or alcohol. I was not particularly hot or cold, and one of the times I was outside in the fresh air. There is no pain.
I am male, 33 years old.
The first time was approximately 8 years ago, the second time approximately 7.5 years ago. Then the third time wasn't until about 2 months ago. And the fourth time was today.
If anybody has any ideas about what this could be, or ideas on what area I should research to try to find out, I would be very appreciative of any info.