draw (third-person singular simple present draws, present participle drawing, simple past drew, past participle drawn) (heading) To move or develop something. To sketch; depict with lines; to produce a picture with pencil, crayon, chalk, etc. on paper, cardboard, etc.
The fetal position might also help ward off conditions like Alzheimer's or Parkinson's: Recent research on animals suggests that your brain does a better job of clearing waste that can lead to these neurological diseases when you're sleeping on your side rather than on your back or stomach. This position's also good for pregnant women.
If you have only been sleeping on your side, the technician may come into the room at some point and ask you to try to sleep on your back. If you never sleep on your back or cannot sleep on your back you do not need to do this in the study. Should I drink alcohol on the night of the sleep study?