Roberts, theories and models of executive function based on neuropsychological studies in humans - introduction; Baddeley and Della Sala, working memory and executive control; Shallice and Burgess, the domain of supervisory processes and temporal organization of behaviour; Damasio, neurobiological and neuropsychological approaches to the study of cognitive and executive function - the somatic marker hypothesis and the possible functions of the prefrontal cortex; Pandya and Yeterian, comparison of prefrontal architecture and connections; Rolls, the orbitofrontal cortex; Goldman-Rakic, the prefrontal landscape - implications of functional architecture for understanding human mentation and the central executive; Petrides, specialized systems for the processing of mnemonic information within the primate frontal cortex; Robbins, dissociating executive functions of the prefrontal cortex; Passingham, attention to action; Diamond, evidence of the importance of dopamine for prefrontal cortex functions early in life; Weinberger and Berman, prefrontal function in schizophrenia - confounds and controversies; Frith, the role of the prefrontal cortex in self-consciousness - the case of auditory hallucinations; Cohen, Braver, O'Reilly, a computational approach to prefrontal cortex, cognitive control and schizophrenia - recent developments and current challenges.