A few years ago I had a series of memory blanks. I thought I hadn't written a test for one of my college classes, thinking about the day of the test I couldn't remember anything at all. But when I e-mailed the professor to ask if I could write at another time she told me I had written it already.

And around the same time, my psychiatrist was sending me for tests, an EEG and an MRI. I remember the MRI, but the only thing I vaguely remember about the EEG is a fleeing impression of being concerned they were putting sticky stuff in my hair. But I don't remember the actual test or even how I got the sticky stuff out of my hair eventually. But nothing showed up on the EEG or the MRI to explain the memory gaps.

In general, when I'm very manic or very depressed I have a hard time remembering what happens. Especially while manic, that gets me in trouble.