There is an additional detached-heads visual tradition, and it appears to be Japanese. Three images are all via Janitor of Lunacy, but I don’t know much more about their specific provenance. (If anyone could offer any in comments I would be appreciative.) The first has the look of a traditional ukiyo-e.
The next is much more in an anime style. It’s the most thaumatophile of the bunch, what with all those wires and a pretty Rotwang-like figure in the background. Since the main character is a robot, it’s perhaps not surprising that she can be insouciant about the fact that she’s carrying her own head.
And the last falls into the category of “I really am at something of a loss to explain what’s going on here.” But I include it because (among other reasons) the visual look of the rings which divide head from body here is the closest image I’ve found to the hyperspatial cinctures in Where Am I?
Like I wrote, if anyone could contribute any understanding here…