This volume focuses on the study of biomedical discussion session. It is part of a series of works which seek to provide a forum for the cross-fertilization of ideas from diverse disciplines that share a mutual interest in discourse - be it construction, computer simulation of natural language, spoken versus written discourse, or other related topics. A variety of approaches to the study of discourse are represented, including: sociolinguistics, psycholinguistics, ethnomethodology and the study of language, educational pyschology, and computational linguistics.