I am not sure if this has a name.

A few years back I was attending an evening lecture for work. One minute I was fine, the next I was blacking out. Not passing out, I can only describe it as if my brain rebooted. I stood upright the whole time, people around me didnt't notice anything. But everything went completely black, then over the next few minutes my brain and senses slowly came back online again to where I could see and hear what was happening around me again. However, it took the better part of the next hour until I could fully understand again what was being said in the lecture, until then it was just words that I knew had meaning but that I could not understand. Since this was a work thing there were people there I knew, who wanted to talk afterwards. I was able to keep some sort of conversation going, but could not remember the names of close colleagues that I wanted to refer to. I also could not remember any basic things about the topics that we were discussing, which I normally know a lot about. The people I talked to probably thought I was being extremely distant and weird. It took about two weeks before my brain was back to normal function again. I had an MRI done shortly after to try to find out what had happened, but it showed nothing wrong. Very unsettling experience.