Structural Resonance Theory (SRT) Finger II — Neural Fingerprints: Spatiotemporal Resonance as the Substrate of Conscious Moments

Abstract (Finger II — Neural Fingerprints) How conscious experience can be both physically instantiated and phenomenally differentiated without reducing experience to localized neural states remains a central problem for theories of consciousness. This paper advances a structural solution within Structural Resonance Theory (SRT) by introducing the concept of neural fingerprints: spatiotemporal resonance geometries that instantiate the qualitative character of experiential blocks. Neural fingerprints are defined not as instantaneous neural states, representational contents, or symbolic encodings, but as temporally extended, distributed regions of resonance space that remain invariant under structure-preserving transformations. The paper formalizes neural fingerprints as equivalence classes of resonance trajectories satisfying integration thresholds, cross-scale coherence, and identity anchoring constraints. This framework explains how similar experiences can arise from distinct microphysical realizations, why experiential continuity persists despite molecular turnover and neural noise, and how experiential differentiation can occur without requiring unique neural codes. Hierarchical organization across spatial and temporal scales is shown to be necessary for fingerprint stability, while embodiment and world-coupling are treated as constraint-transduction processes that stabilize resonance geometry rather than supply representational content. Neural fingerprints are further shown to evolve over developmental and learning timescales through plastic deformation of resonance landscapes, producing path dependence, sensitive periods, and both adaptive and maladaptive stabilization. The paper delineates principled limits on empirical observability, arguing that neural fingerprints are accessible only through structurally appropriate measurements that preserve temporal extension, cross-scale coupling, and transition dynamics. Explicit falsification conditions are specified, including the prediction that experiential character cannot be fully determined by instantaneous neural states or single-scale measures. Finger II integrates directly with the block-based temporal structure of experience developed in Finger I and the ontological commitments of the SRT Palm, providing a non-representational, substrate-neutral account of how experience is physically instantiated without collapsing into reductionism or instrumentalism.