title: Theoretical predictions for spatial covariance of the electroencephalographic signal during the anesthetic-induced phase transition: Increased correlation length and emergence of spatial self-organization

authors: Steyn-Ross, Moira L.

subjects: EEG

abstract: In a recent series of papers, the authors have developed a stochastic theory to describe the electrical response of a spatially homogeneous cerebral cortex to infusion of a general anesthetic agent. We showed that by modeling the GABAergic (propofol-like) drug effect as a prolongation of the inhibitory postsynaptic impulse response, we obtain a prediction that there will be a hysteretically separated pair of first-order phase transitions in the population-average excitatory soma voltage, the first occurring at the point of induction of unconsciousness, and the second at the point of emergence from unconsciousness. In the present paper we generalize our earlier “zero-dimensional” homogeneous cortex to a one-dimensional (1D) line of cortical “mass,” thus allowing for the possibility of spatial inhomogeneities in neural activity. Following the spirit of our earlier adiabatic (“slow membrane”) philosophy, we impose a spatioadiabatic approximation that permits us to compute analytic expressions for changes in EEG (electroencephalographic) correlation length and EEG spatial covariance as a function of anesthetic effect. We establish that the correlation length of the EEG fluctuations is expected to increase at the approach to the transition points, and this finding is consistent with both the homogeneous-cortex prediction of increased correlation time (“critical slowing down”) near transition, and the recent, comprehensive anesthetic study by John et al.[Conscious. Cogn.  10, 165 (2001)] reporting an increase in EEG coherence near the points of loss and recovery of consciousness. In addition, we find that if the long-range (corticocortical) excitatory-to-inhibitory connectivity in the 1D cortex is stronger than the long-range excitatory-to-excitatory connectivity, then the spatioadiabatic system can organize itself into large-amplitude spatial patterns (“dissipative structures”) consisting of giant stationary quasiperiodic voltage fluctuations distributed along the cortical rod.

text: Theoretical predictions for spatial covariance of the electroencephalographic signal during the anesthetic-induced phase transition: Increased correlation length and emergence of spatial self-organization In a recent series of papers, the authors have developed a stochastic theory to describe the electrical response of a spatially homogeneous cerebral cortex to infusion of a general anesthetic agent. We showed that by modeling the GABAergic (propofol-like) drug effect as a prolongation of the inhibitory postsynaptic impulse response, we obtain a prediction that there will be a hysteretically separated pair of first-order phase transitions in the population-average excitatory soma voltage, the first occurring at the point of induction of unconsciousness, and the second at the point of emergence from unconsciousness. In the present paper we generalize our earlier “zero-dimensional” homogeneous cortex to a one-dimensional (1D) line of cortical “mass,” thus allowing for the possibility of spatial inhomogeneities in neural activity. Following the spirit of our earlier adiabatic (“slow membrane”) philosophy, we impose a spatioadiabatic approximation that permits us to compute analytic expressions for changes in EEG (electroencephalographic) correlation length and EEG spatial covariance as a function of anesthetic effect. We establish that the correlation length of the EEG fluctuations is expected to increase at the approach to the transition points, and this finding is consistent with both the homogeneous-cortex prediction of increased correlation time (“critical slowing down”) near transition, and the recent, comprehensive anesthetic study by John et al.[Conscious. Cogn.  10, 165 (2001)] reporting an increase in EEG coherence near the points of loss and recovery of consciousness. In addition, we find that if the long-range (corticocortical) excitatory-to-inhibitory connectivity in the 1D cortex is stronger than the long-range excitatory-to-excitatory connectivity, then the spatioadiabatic system can organize itself into large-amplitude spatial patterns (“dissipative structures”) consisting of giant stationary quasiperiodic voltage fluctuations distributed along the cortical rod.

year: 2003

title: Understanding accountability in an ever-changing New Zealand health system

authors: Zainal Abidin, Nor Azizah Binti

subjects: accountability

abstract: The purpose of this research was to understand how the constant adoption of reforms affected accountability understanding and its practices in the New Zealand public health system. 

This study adopted a qualitative methodology and took a critical hermeneutics approach in order to explore the reasons for, and formats of, public health reform, and the experience of health policy implementers in dealing with reforms, policy changes, and accountability. To develop new insights about accountability and its practices, this study reviewed a range of policy documents and relevant publications, and interviewed senior health managers who were experienced in dealing with reforms. 

The research evidence is presented in line with Ricoeur’s stages of understanding; these are: preunderstanding, understanding, and finally, comprehensive understanding. The preunderstanding was developed from study of secondary sources, while the understanding was achieved through interviews. A comprehensive understanding results from both review of and reflection on preunderstanding and understanding. 

The findings are that reform can be described as a ‘means without ends’ because it was continually implemented in a political loop, in which, demand and supply for change were determined by the government’s political interests. Postreform accountability was full of frustrations because of its complexity in practice. Surprisingly, despite that fact, the health managers still believe that accountability per se is essential. This study proposes that postreform accountability can be understood as two sides of the same coin: accountability means being accountable, in a normative sense, and not being able to be accountable, in practice.
The adoption of constant reforms has increased the level of organisational complexity. This has affected the notion of accountability and its practices because accountability rests in the organisational structures. This study suggests that accountability cannot be detached from its normative and mechanism perspectives. No matter how much the policy has changed or will change in the future, the possibility of policy implementers facing similar challenges and the same feelings is high because reform produces two identical outcomes for accountability: i.e., hopes and frustrations. 

The study contributes in three ways to an understanding of accountability in the context of reform. First, it offers valuable insights into the ongoing developments in the public health system and the issues of accountability. Second, it contributes to the wider understanding of the effects reform have on the notion of accountability and its practices. Third, it advances understanding relating to recent discussions on postreform accountability.

text: Understanding accountability in an ever-changing New Zealand health system The purpose of this research was to understand how the constant adoption of reforms affected accountability understanding and its practices in the New Zealand public health system. 

This study adopted a qualitative methodology and took a critical hermeneutics approach in order to explore the reasons for, and formats of, public health reform, and the experience of health policy implementers in dealing with reforms, policy changes, and accountability. To develop new insights about accountability and its practices, this study reviewed a range of policy documents and relevant publications, and interviewed senior health managers who were experienced in dealing with reforms. 

The research evidence is presented in line with Ricoeur’s stages of understanding; these are: preunderstanding, understanding, and finally, comprehensive understanding. The preunderstanding was developed from study of secondary sources, while the understanding was achieved through interviews. A comprehensive understanding results from both review of and reflection on preunderstanding and understanding. 

The findings are that reform can be described as a ‘means without ends’ because it was continually implemented in a political loop, in which, demand and supply for change were determined by the government’s political interests. Postreform accountability was full of frustrations because of its complexity in practice. Surprisingly, despite that fact, the health managers still believe that accountability per se is essential. This study proposes that postreform accountability can be understood as two sides of the same coin: accountability means being accountable, in a normative sense, and not being able to be accountable, in practice.
The adoption of constant reforms has increased the level of organisational complexity. This has affected the notion of accountability and its practices because accountability rests in the organisational structures. This study suggests that accountability cannot be detached from its normative and mechanism perspectives. No matter how much the policy has changed or will change in the future, the possibility of policy implementers facing similar challenges and the same feelings is high because reform produces two identical outcomes for accountability: i.e., hopes and frustrations. 

The study contributes in three ways to an understanding of accountability in the context of reform. First, it offers valuable insights into the ongoing developments in the public health system and the issues of accountability. Second, it contributes to the wider understanding of the effects reform have on the notion of accountability and its practices. Third, it advances understanding relating to recent discussions on postreform accountability.

year: 2015

title: Viruses without vaccines, or valuing indigenous research? The tensions of introducing Western research assessment practices into an indigenous university

authors: Bruce Ferguson, Pip

abstract: Over my past twenty-five years of educational practice, I have striven to develop a better understanding of indigenous ways of being and doing (in New Zealand’s case, this involves the values and knowledge of Māori). I have done this by visiting and occasionally staying on marae (Māori gathering-places); by reading relevant literature; by engaging in conversations with knowledgeable scholars and by researching the impact of Western practices on indigenous peoples.

In 2003 I managed a research team for Te Wānanga o Aotearoa, a Māori tertiary institution with branches across the country. Our Tertiary Education Commission had just introduced a variation of the English RAE, called the Performance-Based Research Fund, through which government research funds would henceforth be distributed. In collaboration with Māori colleagues, we chose to enter this process, believing that Māori research would be recognised and funded by our participation.

While this proved to be the case, there were significant examples of values clashes, such as the requirement for people to ‘boast’ of their research achievements in a context where such boasting is anathema; to claim ownership of knowledge where tradition often indicates that knowledge is not the property of individuals; and worst, at one point I found myself accused by my Māori manager of introducing ‘viruses without vaccines’. By this he meant Westernised ideas and practices which appeared to be benevolent but in fact were toxic (the idea derives from white settlers who apparently gave native Americans blankets permeated with a virus, causing thousands to die).

In this paper I will explore tensions of operating cross-culturally, and whether/how we can protect people from unintended toxic consequences of intended benevolent actions.

text: Viruses without vaccines, or valuing indigenous research? The tensions of introducing Western research assessment practices into an indigenous university Over my past twenty-five years of educational practice, I have striven to develop a better understanding of indigenous ways of being and doing (in New Zealand’s case, this involves the values and knowledge of Māori). I have done this by visiting and occasionally staying on marae (Māori gathering-places); by reading relevant literature; by engaging in conversations with knowledgeable scholars and by researching the impact of Western practices on indigenous peoples.

In 2003 I managed a research team for Te Wānanga o Aotearoa, a Māori tertiary institution with branches across the country. Our Tertiary Education Commission had just introduced a variation of the English RAE, called the Performance-Based Research Fund, through which government research funds would henceforth be distributed. In collaboration with Māori colleagues, we chose to enter this process, believing that Māori research would be recognised and funded by our participation.

While this proved to be the case, there were significant examples of values clashes, such as the requirement for people to ‘boast’ of their research achievements in a context where such boasting is anathema; to claim ownership of knowledge where tradition often indicates that knowledge is not the property of individuals; and worst, at one point I found myself accused by my Māori manager of introducing ‘viruses without vaccines’. By this he meant Westernised ideas and practices which appeared to be benevolent but in fact were toxic (the idea derives from white settlers who apparently gave native Americans blankets permeated with a virus, causing thousands to die).

In this paper I will explore tensions of operating cross-culturally, and whether/how we can protect people from unintended toxic consequences of intended benevolent actions.

year: 2012