Neurosemiotics of Human Language: Gestural Asymmetry and the Emergence of Signification

This essay offers a theoretical contribution to the investigation of the origins of consciousness, thought, and human language, with particular attention to the themes of functional lateralization and proprioception. Through a neurophenomenological and sensorimotor analysis, it explores how the operational distinction between the upper limbs — for instance, between force and finesse, impulse and control — generates a sensitive motor differentiation that constitutes the foundation of signification. It is argued that tool use, understood not merely as a technical act but as a complex perceptual experience, has induced anatomo-functional transformations in the human brain, primarily through the cooperation between the cerebral hemispheres and the mediation of a reflective interhemispheric structure (the Default Mode Network).Within this framework, language is not conceived as a disembodied abstraction, but rather as the differential symbolization of proprioceptively perceived gestures, supported by a dynamic bodily grammar. Special emphasis is placed on the evolutionary continuity between gestural and vocal language: phonetic articulation is interpreted here as a reflective transformation of manual gesture, internalized and made capable of acting upon the other not through objects, but through sound. The voice, therefore, is not detached from the body but emerges as a reorganized motor expression, in which each spoken phrase functions as an effective gesture.Consciousness is thus conceived as the body's capacity to question its own modes of action, enabling intentionality, symbolic construction, and self-reflection. From this embodied grammar — grounded in proprioceptive tension and interhemispheric mediation — human language emerges as a symbolic technology of gesture.