Dead Space Art: What they studied

So the Dead Space team studied pictures of car crash victims and war scenes to get it right.

"We knew this would be difficult to portray, because sometimes gore in games looks cheap and unrealistic," executive producer Glen Schofield told Edge. "Sure enough, the first few corpses that we did, just weren’t convincing enough. I rejected them.

"This sounds horrible, but we had to go look at pictures of car accidents and war scenes and things like that because we had to get it right; we had to portray scenes of terrible carnage and realism. It’s a big part of making that experience convincing."

Straight from Kotaku.com