title: Book reviews and Book notices

authors: Waikato Geological Society

abstract: Book reviews and Book notices from Volume 4, Number 2, 1970 of Earth Science Journal.

text: Book reviews and Book notices Book reviews and Book notices from Volume 4, Number 2, 1970 of Earth Science Journal.

year: 1970

title: Finding synaptic couplings from a biophysical model of motor evoked potentials after theta-burst transcranial magnetic stimulation

authors: Wilson, Marcus T.

subjects: Cortical plasticity

abstract: OBJECTIVE: We aimed to use measured input-output (IO) data to identify the best fitting model for motor evoked potentials. METHODS: We analyzed existing IO data before and after intermittent and continuous theta-burst stimulation (iTBS & cTBS) from a small group of subjects (18 for each). We fitted individual synaptic couplings and sensitivity parameters using variations of a biophysical model. A best performing model was selected and analyzed. RESULTS: cTBS gives a broad reduction in MEPs for amplitudes larger than resting motor threshold (RMT). Close to threshold, iTBS gives strong potentiation. The model captures individual IO curves. There is no change to the population average synaptic weights post TBS but the change in excitatory-to-excitatory synaptic coupling is strongly correlated with the experimental post-TBS response relative to baseline. CONCLUSIONS: The model describes population-averaged and individual IO curves, and their post-TBS change. Variation among individuals is accounted for with variation in synaptic couplings, and variation in sensitivity of neural response to stimulation. SIGNIFICANCE: The best fitting model could be applied more broadly and validation studies could elucidate underlying biophysical meaning of parameters.

text: Finding synaptic couplings from a biophysical model of motor evoked potentials after theta-burst transcranial magnetic stimulation OBJECTIVE: We aimed to use measured input-output (IO) data to identify the best fitting model for motor evoked potentials. METHODS: We analyzed existing IO data before and after intermittent and continuous theta-burst stimulation (iTBS & cTBS) from a small group of subjects (18 for each). We fitted individual synaptic couplings and sensitivity parameters using variations of a biophysical model. A best performing model was selected and analyzed. RESULTS: cTBS gives a broad reduction in MEPs for amplitudes larger than resting motor threshold (RMT). Close to threshold, iTBS gives strong potentiation. The model captures individual IO curves. There is no change to the population average synaptic weights post TBS but the change in excitatory-to-excitatory synaptic coupling is strongly correlated with the experimental post-TBS response relative to baseline. CONCLUSIONS: The model describes population-averaged and individual IO curves, and their post-TBS change. Variation among individuals is accounted for with variation in synaptic couplings, and variation in sensitivity of neural response to stimulation. SIGNIFICANCE: The best fitting model could be applied more broadly and validation studies could elucidate underlying biophysical meaning of parameters.

year: 2023-02-15

title: Breaking barriers and empowering perspectives: Centering women's voices in the mongrel mob wāhine toa

authors: Arnold, Annaliese

subjects: gang research

abstract: Gang communities in Aotearoa New Zealand have traditionally been sites of masculinity where specific forms of 'maleness' - including resistance to authority, antisocial behaviour, and expressions of violence - are embraced, expressed, and enforced through various internal cultural norms and reactions to the outside world. The dominant narrative that informs public perceptions of New Zealand gangs is often centered on crime, poverty, and Indigeneity. Much less is known about the role of women in these communities, particularly as their voices have only recently emerged from one of the largest gang chapters in the country. This research, conducted in close collaboration with wāhine within the Mongrel Mob Kingdom's first female-only chapter, Mongrel Mob Wāhine Toa, uses a participatory action research approach with photovoice methodology. Drawing on the personal narratives of six wāhine, this study aims to better understand their perspectives and experiences of contributing to a fledgling movement that privileges women within a predominantly male-centered gang environment. Photovoice is used alongside semi-structured interviews to provide depth and breadth to the data, allowing the wāhine to visually and verbally express their experiences and perspectives. Themes include navigating marginality, empowerment, and resistance. The long-range goal of this work is to inform context-sensitive policies and interventions for wāhine in gangs in Aotearoa. By foregrounding the perspective of wāhine, this study contributes to breaking down barriers and reshaping discourses around women in gangs, with implications for well-being and empowerment.

text: Breaking barriers and empowering perspectives: Centering women's voices in the mongrel mob wāhine toa Gang communities in Aotearoa New Zealand have traditionally been sites of masculinity where specific forms of 'maleness' - including resistance to authority, antisocial behaviour, and expressions of violence - are embraced, expressed, and enforced through various internal cultural norms and reactions to the outside world. The dominant narrative that informs public perceptions of New Zealand gangs is often centered on crime, poverty, and Indigeneity. Much less is known about the role of women in these communities, particularly as their voices have only recently emerged from one of the largest gang chapters in the country. This research, conducted in close collaboration with wāhine within the Mongrel Mob Kingdom's first female-only chapter, Mongrel Mob Wāhine Toa, uses a participatory action research approach with photovoice methodology. Drawing on the personal narratives of six wāhine, this study aims to better understand their perspectives and experiences of contributing to a fledgling movement that privileges women within a predominantly male-centered gang environment. Photovoice is used alongside semi-structured interviews to provide depth and breadth to the data, allowing the wāhine to visually and verbally express their experiences and perspectives. Themes include navigating marginality, empowerment, and resistance. The long-range goal of this work is to inform context-sensitive policies and interventions for wāhine in gangs in Aotearoa. By foregrounding the perspective of wāhine, this study contributes to breaking down barriers and reshaping discourses around women in gangs, with implications for well-being and empowerment.

year: 2025