11 - Processes of Utterance Interpretation: For a Neuropragmatics

Summary

The context-based selection of semantic representations is presented as an essential issue in understanding the interpretation of speech meaning. Clinical findings serve to illustrate the role of the thalamus, the basal ganglia, and the cerebellum in processing subtle context-related differences in meaning. The paucity of findings relating to spoken language is emphasized along with the need to specify neuropragmatic principles of context-based activations of semantic and episodic representations.With a view on developing such principles, several relevant findings are reviewed relating to cortico-thalamic interactions and the pivotal role of the motor thalamus in integrating multisensory information from basal-ganglia circuits and the cerebellum. The on-line selection of semantic and episodic representations is also discussed in terms of experiments on the role of the hippocampus and frontal circuits suggesting some parallels with navigation, but the on-line processing of speech requires a chunking of action-related sequences which appears to involve the basal ganglia and critical cortico-thalamic loops.