Where am ‘I’ in the brain? This is not a new question, and by examining the structure of the brain and determining its interconnections, it is not unreasonable to assume that the self and the other functions of the brain can be found a home. Indeed, early in the 20th century, many scientists attempted to chart the workings of the mind onto the brain by detailing its anatomy and physio-logy. The task of localizing function, however, has proven to be much more difficult than initially presumed, with many regions of the brain subserving a variety of processes and having only loose coupling of structure and function. Hence, the majority of neuropsychological tests and the various brain capacities they tap lack regional specificity. This is a complex and sophisticated problem in the healthy brain that is compounded significantly by damage or disease. However, in the past two decades, neuroimaging has rekindled and renewed enthusiasm for unraveling brain function.

Amongst the many techniques and technologies that have been developed, functional magnetic resonance imaging (fMRI) has been one of the most exciting and perhaps the most widely used. It has permitted unprecedented access to the living brain and united scientists from a variety of scientific fields. In this special issue of Acta Neuropsychiatrica, we have brought together researchers with differing expertise and interests to showcase the range of applications of functional neuroimaging in humans.

Professor Veena Kumari (Reference Kumari1) begins the discussion by synthesizing the imaging literature that has identified neural correlates of psychotherapeutic effects and points to the potential neurobiological substrates of various mental phenomena. This theme is revisited by Professor Michael Berk's group (Reference Williams, Jacka, Pasco, Dodd and Berk2), in their description of links between depression and pain and the potential use of neuroimaging to explicate this association. Drs Morgan Haldane and Sophia Frangou (Reference Haldane and Frangou3) review the findings of neuroimaging studies in mood disorders suggesting that despite the use of disparate functional imaging modalities, the results show reassuring consistency. Similarly but more specifically, Drs Tracy and Sukhi Shergill (Reference Tracy and Shergill4) interrogate the neuroimaging evidence amassed from studies examining auditory hallucinations and suggest potential implications for future treatment and further research.

The remaining articles report findings from studies that have used a variety of imaging techniques and innovations. For instance, Erik Berntsen and colleagues (Reference Berntsen, Rasmussen and Samuelsen5) describe the development of a new stimulus for use within fMRI to lateralize language dominance, and Professor Terence Ketter's group (Reference Wang, Sailasuta, Chandler and Ketter6) describes the findings from a spectroscopy study in bipolar disorder, noting a possible increase in occipital GABA concentrations. Finally, Dr Jim Lagopoulos and colleagues (Reference Lagopoulos, Gordon and Ward7) detail new applications such as coupling fMRI with physiological measures and the use of cerebrovascular autoregulation as a neuroimaging tool (Reference Lagopoulos, Malhi and Ivanovski8), making the point that although neuroimaging has advanced considerably, there remains significant potential for further development.

As guest editors, we thank the editor Michael Maes for supporting this exciting issue and the many contributors for sharing their ideas and research. It is our hope that the articles in this issue are thought provoking and provide impetus for further research, and that in the near future, with further technological leaps, in addition to seeing with our minds eye, we will be able to see our minds with our eyes.