How to Use Microhistory Methodology in Mental Health Research

Incorporating anthropological principles, microhistory is a research methodology useful for exploring the interplay between ordinary people and social abstractions such as, the market, social systems, and governments. In this paper, the background and characteristics of microhistory are described, and a novel six-stage approach for conducting microhistories in mental healthcare is introduced. Each stage of the process is illustrated using sections from a microhistory focussed on the earliest recorded case comparison between British colonial mental healthcare and Aboriginal Australian traditional healing. Microhistory provides a way to uncover new insights about past mental healthcare, which may contribute to re-conceptualisations of modern-day beliefs and practices.

Brain charts for the human lifespan

Over the past few decades, neuroimaging has become a ubiquitous tool in basic research and clinical studies of the human brain. However, no reference standards currently exist to quantify individual differences in neuroimaging metrics over time, in contrast to growth charts for anthropometric traits such as height and weight1. Here we assemble an interactive open resource to benchmark brain morphology derived from any current or future sample of MRI data ( http://www.brainchart.io/ ). With the goal of basing these reference charts on the largest and most inclusive dataset available, acknowledging limitations due to known biases of MRI studies relative to the diversity of the global population, we aggregated 123,984 MRI scans, across more than 100 primary studies, from 101,457 human participants between 115 days post-conception to 100 years of age. MRI metrics were quantified by centile scores, relative to non-linear trajectories2 of brain structural changes, and rates of change, over the lifespan. Brain charts identified previously unreported neurodevelopmental milestones3, showed high stability of individuals across longitudinal assessments, and demonstrated robustness to technical and methodological differences between primary studies. Centile scores showed increased heritability compared with non-centiled MRI phenotypes, and provided a standardized measure of atypical brain structure that revealed patterns of neuroanatomical variation across neurological and psychiatric disorders. In summary, brain charts are an essential step towards robust quantification of individual variation benchmarked to normative trajectories in multiple, commonly used neuroimaging phenotypes.

Sustained rescue of prefrontal circuit dysfunction by antidepressant-induced spine formation

The neurobiological mechanisms underlying the induction and remission of depressive episodes over time are not well understood. Through repeated longitudinal imaging of medial prefrontal microcircuits in the living brain, we found that prefrontal spinogenesis plays a critical role in sustaining specific antidepressant behavioral effects and maintaining long-term behavioral remission. Depression-related behavior was associated with targeted, branch-specific elimination of postsynaptic dendritic spines on prefrontal projection neurons. Antidepressant-dose ketamine reversed these effects by selectively rescuing eliminated spines and restoring coordinated activity in multicellular ensembles that predict motivated escape behavior. Prefrontal spinogenesis was required for the long-term maintenance of antidepressant effects on motivated escape behavior but not for their initial induction.

Colonial surgeon Patrick Hill (1794-1852): unacknowledged pioneer of Australian mental healthcare

Despite making a substantial contribution to the development of mental health services in colonial Australia, until now the story of Dr Patrick Hill's (1794-1852) life has been overlooked by historians. This paper reviews primary sources including clinical notes, patient lists, letters, government documents and newspaper articles which reveal that Dr Hill was a dedicated physician who played a vital role in the development of Australian mental healthcare. He was held in such esteem that by the time of his sudden death in 1852 he had been elevated to the most senior medical office in New South Wales. Dr Hill's career serves to exemplify how the local practice of individual colonial doctors helped build the reputation of medicine in the modern era.

Life of Martha Entwistle: Australia's first convict mental health nurse

The present position paper provides an account of the life of Martha Entwistle, the earliest recorded convict nurse who worked within the Castle Hill Asylum. In our review of primary historical sources, Australia's first convict mental health nurse was found to be a resilient woman who endured several traumatic life experiences. Her nursing within Australia's first mental health asylum was highly valued by the superintendent of the service. She nursed in a harsh colonial environment, short of adequate resources, during an era of fast-paced industrial and technological a change. Martha Entwistle's experiences provide a historical account of the role of the early convict mental health nurse. Her life story enables modern-day nurses to reflect on the advances made in mental health nursing and contexts of care for nurses today.