A communication system of symbolic expression that has an organized grammar and syntax to convey semantic content. A communication system of symbolic expression that has an organized grammar and syntax to convey semantic content. The term language without qualification generally refers to verbal symbol use. It includes verbal expression and comprehension and may be expressed through gesture (e.g. sign language).
Despite the view that cognitive neuropsychology does not have a model which can cope with the complexity of human language, it contributes to aphasiology a single-case-study approach to research, a detailed investigation of impairments through psycholinguistically controlled tests, and explanation of underlying patterns of deficit in terms of information processing.