The role and scope of contemporary midwifery practice in Australia: A scoping review of the literature.

PROBLEM: Little is known about the breadth of midwifery scope within Australia, and few midwives work to their full scope of practice. BACKGROUND: Midwives in Australia are educated and professionally accountable to work in partnership with childbearing women and their families, yet they are currently hindered from practicing within their full scope of practice by contextual influences. AIMS: To perform a scoping review of the literature to map out the role and scope of contemporary midwifery practice in Australia To identify any key issues that impact upon working within the full scope of midwifery practice in the Australian context METHODS: A scoping review of the literature guided by the Arksey and O'Malley's five-stage methodological framework, and the 'best fit' framework synthesis using the Nursing and Midwifery Board of Australia's Midwifery Standards for Practice. FINDINGS: Key themes that emerged from the review included Partnership with women; The professional role of the midwife; and Contextual influences upon midwifery practice. DISCUSSION: Tensions were identified between the midwifery scope of practice associated with optimal outcomes for women and babies supported by current evidence and the actual role and scope of most midwives employed in models of care in the current Australian public healthcare system. CONCLUSIONS: There is a mismatch between the operational parameters for midwifery practice in Australia and the evidence-based models of continuity of midwifery carer that are associated with optimal outcomes for childbearing women and babies and the midwives themselves.

Identification of BDNF sensitive electrophysiological markers of synaptic activity and their structural correlates in healthy subjects using a genetic approach utilizing the functional BDNF Val66Met polymorphism.

Increasing evidence suggests that synaptic dysfunction is a core pathophysiological hallmark of neurodegenerative disorders. Brain-derived neurotropic factor (BDNF) is key synaptogenic molecule and targeting synaptic repair through modulation of BDNF signalling has been suggested as a potential drug discovery strategy. The development of such "synaptogenic" therapies depend on the availability of BDNF sensitive markers of synaptic function that could be utilized as biomarkers for examining target engagement or drug efficacy in humans. Here we have utilized the BDNF Val66Met genetic polymorphism to examine the effect of the polymorphism and genetic load (i.e. Met allele load) on electrophysiological (EEG) markers of synaptic activity and their structural (MRI) correlates. Sixty healthy adults were prospectively recruited into the three genetic groups (Val/Val, Val/Met, Met/Met). Subjects also underwent fMRI, tDCS/TMS, and cognitive assessments as part of a larger study. Overall, some of the EEG markers of synaptic activity and brain structure measured with MRI were the most sensitive markers of the polymorphism. Met carriers showed decreased oscillatory activity and synchrony in the neural network subserving error-processing, as measured during a flanker task (ERN); and showed increased slow-wave activity during resting. There was no evidence for a Met load effect on the EEG measures and the polymorphism had no effects on MMN and P300. Met carriers also showed reduced grey matter volume in the anterior cingulate and in the (left) prefrontal cortex. Furthermore, anterior cingulate grey matter volume, and oscillatory EEG power during the flanker task predicted subsequent behavioural adaptation, indicating a BDNF dependent link between brain structure, function and behaviour associated with error processing and monitoring. These findings suggest that EEG markers such as ERN and resting EEG could be used as BDNF sensitive functional markers in early clinical development to examine target engagement or drug related efficacy of synaptic repair therapies in humans.