The Brain's Concepts Mirror Neurons, Simulation Semantics, and the Neural Theory of Language George Lakoff University of California, Berkeley A discussion of recent collaborative work with Vittorio Gallese (of the mirror neuron group in Parma) on the direct role of the sensory-motor system in characterizing concepts - including abstract concepts like freedom, love, or causation. The talk is set with the Neural Theory of Language now being developed at Berkeley. It discusses how semantics can be based on neural simulation, with neural computational models provided via Feldman-Narayanan structured connectionist models, and natural language semantics provided via cognitive semantics. There are two parts to the talk. The first contradicts the idea that all concepts are "abstractions" in the sense that they must be represented in the brain independently of the sensory-motor system. It traces thoroughly through one example where enough is known about the neuroscience, the neural computation, and the linguistics to argue that the brain's sensory-motor system can fully characterize the properties of the given concept. The second part takes up the role of conceptual metaphors and "Cogs" in adapting the sensory-motor system to characterize the meanings of abstract concepts. The idea of "Cogs" is new, and central to how the sensory-motor system can characterize the semantics of grammar. Included is the idea of "dissociative learning" - the use of neural inhibition to produce conceptual and linguistic generalizations from exemplars. The point of the talk is to cash out the idea of embodied meaning, presented in the speaker's earlier work and underlying current research on the neural theory of language.