Inversivasilla

Inversivasilla is a neologism that has appeared in a small number of online discussions, speculative fiction writings, and experimental design proposals. The term combines inversiva, from inverting or reversing, with silla, the Spanish word for chair, yielding a label used to describe a hypothetical mechanism, device, or process that involves inversion enacted through a chair-based interface or context. Because the term is not established in academic literature, its meaning is context-dependent and varies across sources.

In science fiction and speculative design, inversivasilla may denote a chair-mounted apparatus that creates local inversion of perception, gravity, or movement, enabling characters to traverse spaces in unusual ways or to explore altered states of embodiment.

In cognitive science or philosophy discussions, it has been used as a thought experiment to probe how bodily orientation and environmental cues shape intention, action, and perception when the chair or seating context is inverted or reorganized.

Origins are unclear, with no widely cited inventor; the earliest instances appear in online forums and zines in the late 2010s. The term remains rare and informal, without formal definition or standard usage.

Related concepts include embodiment, proprioception, inversion (logic and linguistics), and human–computer interaction in which seating interfaces influence control mappings.