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Hallucinations and delusions are striking features of schizophrenia that have been difficult to explain. Fletcher and Frith discuss cognitive theories of the positive symptoms of schizophrenia and describe how abnormalities in error-dependent learning could underlie both hallucinations and delusions.
Facial expressions of emotion are universal, but the sensitivity with which these expressions are recognized differs between individuals. Leppänen and Nelson discuss how a network of emotional and visual processing areas develops through experience-expectant and experience-dependent mechanisms.
Brain banking has supported many important advances in neuroscience research. Kretzschmar describes the advantages and opportunities offered by brain banking and provides insight into the challenges facing brain banks in the future.