A cognitive and  neurolinguistic approach to  bilingualism that looks into how language is represented in the brain: that is, how and where our brain stores our knowledge of the language (or languages) that we speak, understand, read, and write. The main areas of discussion are related to the study  of the physiological mechanisms by which the brain processes information related to language  and they involve neuroscience, linguistics, cognitive science, neurobiology, and communication disorders among others.