Metaphor Space names the cognitive-psychological region constituted when spatial language is appropriated to designate the interior terrain of mind. The concept receives its most systematic treatment in Julian Jaynes, who argues that consciousness itself is structured as a metaphor space — a paraphrand generated by the wholesale transfer of physical-spatial predicates (‘back of the mind,’ ‘inner recesses,’ ‘beyond’) onto an entity that has no literal extension whatsoever. For Jaynes, spatialization is the first and most primitive feature of consciousness, the very habitat of introspection. Mark Epstein converges on this position from a Buddhist-psychotherapeutic direction, observing that both meditation and psychotherapy begin with a spatial metaphor of the self — bounded, layered, possessed of a core — and that the transformative work of either discipline requires dismantling exactly that presupposition. Iain McGilchrist approaches metaphor space neurologically, linking the living metaphor to right-hemisphere processing and arguing that all language is, in origin, metaphorical and spatial, grounding abstract concepts in embodied reality. Otto Rank supplies a mythological genealogy, tracing how bodily orientation expands macrocosmically into the language of space and time. Derrida, characteristically, deconstructs the ground from beneath the whole structure, arguing that no stable metaphor-concept distinction can be maintained, since philosophy is itself a fund of catachreses. The central tension in the corpus is whether metaphor space is a productive, generative structure of mind (Jaynes, McGilchrist) or a metaphysical illusion that conceals its own constructedness (Epstein, Derrida).