can you be less than sedentary?

What if you basically sit around all day studying, etc. but not really walking anywhere or anything? Would you still go by sedentary, or is it less than that? If you lie in bed all day, do you just go by your BMR to know how much to eat to maintain?

Edit: I don't do this everyday, but some days, I'm basically doing school work all day, with no time to do anything else. Just wondering if I'll gain on sedentary..

That's sedentary.

Someone who is bedridden or in a coma would just eat their BMR to maintain. =)

Oh okay that's great to know! Thanks! I'll try not to feel guilty eating 1600 when I do absolutely nothing then!