A theoretical framework proposing consciousness as a fundamental fifth coordinate [con] alongside spacetime [x,y,z,t]. Within Many-Worlds quantum mechanics, observers experience single branches through measurement in consciousness space, where [con] coordinates exist in quantum superposition until collapse selects specific trajectories. The framework treats consciousness as a fundamental field requiring mass-energy conversion (~10^-21 kg/s), remaining invariant under Lorentz transformations while explaining quantum measurement, entanglement, and the preferred basis problem without modifying established physics. Includes testable predictions for quantum coherence patterns, information integration thresholds, and consciousness measurement signatures.