> I don't think you can explain the curious quality of the "I-just-woke-up" vocal tone as being due entirely to a person's grogginess.
> Wolf "puzzled" spirit

I was thinking about your example of a person getting up suddenly to answer the phone. One possibility, which is usually the case with me, is that if I get up quickly I have difficulty distinguishing dream from reality for a few minutes (well, 45 minutes on a bad morning). Sometimes both feel like they're happening at the same time, and it is all very confusing. If a person is not dreaming, often there's the "I'd-rather-ignore-you-and-keep-sleeping" mentality, if that is substantially different from waketime grogginess.

There might be less bloodflow to the brain right after sleep. Someone else will have to verify or eliminate that thought.

While writing this, my mother walked through the room. She's a nurse, so I asked her. She suggests that mucus accumulates on the vocal cords of people while they are asleep and not using their voices. The mucus would make the voices unsteady and different for a short period of time.

gab"fully awake now--a rarity"by