Neurophenomenology of the Linguistic Sign: Contribution of the Phenomenological Morphodynamics and Structuralist (PMS) Model to Understanding the Neural Mechanisms Underlying the Constitution of Meaning. This paper describes a research program in neurosemiotics. The main idea is to propose the N400 component of the Event-Related Potential (ERP) as an « empirical referee » between two paradigms aiming at understanding meaning constitution. The first one is the classic functionnalist paradigm of cognitive sciences that describes computations for lexical access. The second one gathers Saussure structuralism, Husserlian phenomenology and Thom and Petitot morphodynamics.