Idiomatic language comprehension: neuropsychological evidence

Idioms [1] are conventional expressions, in general deeply connected to culture, whose meaning cannot be derived from an analysis of the constituent words' typical meanings (e.g., to kick the bucket). Conventionality gives an idea of the strength of the association between an idiomatic expression and its meaning within a given culture and is determined by the discrepancy between the idiomatic phrasal meaning and the meaning we would predict for the collocation if we were to consult only the rules to determine the meanings of the constituents in isolation [2]. Idioms do not form a unitary class and rather vary along a number of syntactic and semantic dimensions [2, 3]. For example, they vary as to their semantic transparency/opacity, which refers to the ease with which the motivation for their structure can be recovered. Idioms can involve figuration and can be originally metaphorical (e.g., take the bull by the horns), even if speakers may not perceive the figure originally involved; i...