Arcuate Fasciculus (Functional Analog)

Claim Type: mechanism_hypothesis
Scope: Language nudges via a dorsal sequence-to-motor channel
Depends On: ARC-009, ARC-002, ARC-018, ARC-005
Status: candidate
Claim ID: MECH-038

This document treats the arcuate fasciculus (AF) as a functional analog, not an anatomical requirement. Comparative and clinical evidence suggest the human AF has expanded temporal projections and a strong dorsal pathway, but language relies on distributed dorsal + ventral streams rather than a single tract (see docs/notes/evidence_map.md).

REE interpretation: an AF-like channel provides fast sequence → motor coupling that biases the system toward emergent symbolic communication, while leaving language as a coordination/compression layer rather than a new module.

Functional nudges for language emergence

  • High-bandwidth sequence-to-motor channel: fast routing from hippocampal rollouts / E1 sequence summaries into E2 articulation affordances.
  • Low-latency correction loop: rapid self- and other-correction signals that can interrupt or refine outputs before commitment.
  • Distributed meaning grounding: a ventral-style pathway (semantic alignment) coexists with the dorsal sequence channel; neither alone is sufficient for language.

These nudges predispose REE to natural language emergence under joint attention and coordination pressure without introducing a dedicated language module.

Open Questions

None noted in preserved sources.

  • MECH-038
  • ARC-009
  • MECH-010
  • ARC-002
  • ARC-018
  • ARC-005

References / Source Fragments

  • docs/thoughts/2026-02-09_arcuate_fasciculus_language_nudges.md

REE is developed by Daniel Golden (Latent Fields). Apache 2.0.