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BACKGROUND: Acute nicotine administration potentiates brain reward function and enhances motor and cognitive function. These studies investigated which brain areas are being activated by a wide range of doses of nicotine, and if this is diminished by pretreatment with the nonselective nicotinic receptor antagonist mecamylamine. METHODS: Drug-induced changes in brain activity were assessed by measuring changes in the blood oxygen level dependent (BOLD) signal using an 11.1-Tesla magnetic resonance scanner. In the first experiment, nicotine naïve rats were mildly anesthetized and the effect of nicotine (0.03-0.6 mg/kg) on the BOLD signal was investigated for 10 min. In the second experiment, the effect of mecamylamine on nicotine-induced brain activity was investigated. RESULTS: A high dose of nicotine increased the BOLD signal in brain areas implicated in reward signaling, such as the nucleus accumbens shell and the prelimbic area. Nicotine also induced a dose-dependent increase in the BOLD signal in the striato-thalamo-orbitofrontal circuit, which plays a role in compulsive drug intake, and in the insular cortex, which contributes to nicotine craving and relapse. In addition, nicotine induced a large increase in the BOLD signal in motor and somatosensory cortices. Mecamylamine alone did not affect the BOLD signal in most brain areas, but induced a negative BOLD response in cortical areas, including insular, motor, and somatosensory cortices. Pretreatment with mecamylamine completely blocked the nicotine-induced increase in the BOLD signal. CONCLUSIONS: These studies demonstrate that acute nicotine administration activates brain areas that play a role in reward signaling, compulsive behavior, and motor and cognitive function.
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Encéfalo/efeitos dos fármacos , Encéfalo/fisiopatologia , Nicotina/farmacologia , Agonistas Nicotínicos/farmacologia , Animais , Mapeamento Encefálico , Circulação Cerebrovascular/efeitos dos fármacos , Circulação Cerebrovascular/fisiologia , Comportamento Compulsivo/fisiopatologia , Relação Dose-Resposta a Droga , Imageamento por Ressonância Magnética , Masculino , Mecamilamina/farmacologia , Antagonistas Nicotínicos/farmacologia , Oxigênio/sangue , Ratos Wistar , RecompensaRESUMO
BACKGROUND: Persons with higher blood pressure have emotional dampening in some contexts. This may reflect interactive changes in central nervous system control of affect and autonomic function in the early stages of hypertension development. PURPOSE: The purpose of this study is to determine the independence of cardiovascular emotional dampening from alexithymia to better understand the role of affect dysregulation in blood pressure elevations. METHODS: Ninety-six normotensives were assessed for resting systolic and diastolic (DBP) blood pressure, recognition of emotions in faces and sentences using the Perception of Affect Task (PAT), alexithymia, anxiety, and defensiveness. RESULTS: Resting DBP significantly predicted PAT emotion recognition accuracy in men after adjustment for age, self-reported affect, and alexithymia. CONCLUSIONS: Cardiovascular emotional dampening is independent of alexithymia and affect in men. Dampened emotion recognition could potentially influence interpersonal communication and psychosocial distress, thereby further contributing to BP dysregulation and increased cardiovascular risk.
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Afeto/fisiologia , Sintomas Afetivos/psicologia , Pressão Sanguínea/fisiologia , Emoções/fisiologia , Hipertensão/psicologia , Adolescente , Adulto , Sintomas Afetivos/fisiopatologia , Feminino , Humanos , Hipertensão/fisiopatologia , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Percepção Social , Adulto JovemRESUMO
Autistic girls, women and gender diverse people have specific needs that are underrepresented in research. Research priorities are often established by funding bodies, researchers, parents, carers and health professionals and may not meet the needs of the diverse Autistic community. This co-produced project aimed to identify what research would benefit the lives of Autistic girls, women and gender diverse people in Australia. We interviewed 47 Autistic girls, women and gender diverse people aged seven and above and obtained feedback from an additional 411 Autistic people through an online survey. Autistic young people identified six key research priorities including (1) better understanding and support at school, (2) understanding our experiences, strengths and challenges, (3) autism specific mental health support, (4) Autistic friendships and relationships, (5) experiences of gender diversity and (6) accommodations to make life easier for us. Eight key research priority areas were identified by Autistic adults including (1) understanding and supporting specific needs in adulthood, (2) experiences of trauma, abuse and sexual violence, (3) supporting mental health and wellbeing, (4) addressing barriers in healthcare, (5) understanding and supporting physical health needs, (6) addressing barriers in education and the workplace, (7) understanding the role of society, embracing neurodiversity and the importance of Autistic identity and (8) co-designing research and supports with Autistic people. We provide a discussion around the importance of focusing on these research priority areas in future autism research in Australia.
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LAY ABSTRACT: Autism research is changing. Autistic activists and researchers want Autistic people in the community to have more of a say about what is researched and how. But we haven't asked people in the community what they think. This study used the information obtained from 55 community members, including Autistic people, their families, and professionals working with Autistic people, from an existing study on their priorities for autism research. We re-looked at what was said to see if we could understand community members' views and experiences of autism research. People agreed strongly that research can play a powerful role in shaping good Autistic lives. They also felt that big changes were needed for research to do this. Some of these changes were that researchers should stop thinking about autism narrowly and in a negative way, where Autistic people are seen as the problem. Researchers need to think more about how to improve systems, experiences and how other people respond to Autistic people. They also want the autism community to be more involved in what is researched and how it is researched. The findings from our study here highlight the potential for research to be positive when Autistic people and their families are listened to, approached with understanding, and are respected and valued as individuals in the research process.
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LAY ABSTRACT: Researchers have found the way people feel about their financial situation is related to their quality of life. We know that many autistic people find it hard to find a job. And for those autistic people who have a job, they are often underpaid. Not having a job or being underpaid often means having low income. Having low income is likely to influence how autistic people feel about their financial situation. However, no research has looked at these issues for autistic people. This is the first study that helps us learn more about what autistic adults think about their financial situation. We looked at autistic people's thoughts on this issue compared to people from the general Australian population. We also looked at what things might impact how autistic people feel about their financial situation-which might be how much money they earn, what they do with that money, and their mental health. Many autistic adults felt they were struggling with financial wellbeing and this was connected both to the level of their income and how they said they managed their money. Those who were able to save and not borrow for everyday expenses reported feeling a greater sense of financial wellbeing. Concrete changes might help to improve autistic people's financial wellbeing. We need to investigate how we can help autistic people find and keep well-paying jobs. And we need to work out the best ways of equipping autistic people with the skills they need in financial matters.
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LAY ABSTRACT: Money matters in people's lives. It helps to meet people's basic needs (food, clothes, shelter) and live the lives they want to. When people talk about 'financial wellbeing', they mean how much you feel in control over day-to-day finances and how much freedom you have to make choices to enjoy life. We don't know what autistic people think about these things. That's why we did our study. We spoke to 21 autistic adults (24-69 years) about how they felt about their financial situation. We deliberately spoke to people who had told us previously they felt 'financially well' or 'financially unwell' so we could hear a range of opinions. Autistic people told us financial wellbeing meant having enough money to pay for their basics needs, to have a safety net for unexpected bills and not having to worry about money now or in the future. But many felt that good financial wellbeing was not possible for them. They often did not have a stable income to cover day-to-day expenses. This limited the choices they could make. Despite these challenges, autistic people told us they worked hard to budget and save money when they could - because feeling financial insecure was just too stressful, especially when they could not rely on family or friends for support. It made them feel mentally unwell. Our study shows there are many factors that influence autistic people's financial wellbeing. We need more research to help us understand how autistic people can be supported to achieve financial security.
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BACKGROUND: Autistic women and gender diverse people have specific needs related to their physical and mental health. They also experience more barriers to accessing services. While there are autobiographical accounts of the 'invisible' challenges that autistic women and gender diverse people face day-to-day, there has been limited research that explores how these experiences impact health and wellbeing. OBJECTIVES: This study aimed to understand the everyday experiences of autistic women and gender diverse people, and their impact on health and wellbeing. DESIGN: Qualitative methods were used to elicit rich information about the unique experiences of autistic women and gender diverse people. METHODS: We conducted semi-structured interviews with 31 autistic adults. The data were analysed using reflexive thematic analysis. RESULTS: We identified 3 themes and 10 subthemes. Our first theme described 'all the stuff that you have to do to get through life', including managing domestic tasks, parenting, unique health needs and co-occurring physical conditions. The second theme outlined the impact of 'living in a world that's not about us', describing how navigating the neurotypical world, managing gender role expectations and trying to fit impacts on mental health. Our third theme outlined the positive impacts of 'shedding all the layers and being myself', including the importance of formal identification, exploring autistic identity and community, and including autistic people in research to support them to 'have a good life on their own terms'. CONCLUSION: This study emphasized the importance of shifting the responsibility of health and wellbeing from the individual, and the importance of interpersonal, community, cultural, policy and societal factors in ensuring positive health outcomes for autistic women and gender diverse people. It also highlighted areas that enable autistic women and gender diverse people to flourish, including autistic community connectedness, positive relationships and autistic-affirming support from health professionals.
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Transtorno Autístico , Adulto , Humanos , Feminino , Pessoal de Saúde , Saúde Mental , PolíticasRESUMO
In this paper, we report on a participatory oral history study documenting the lives of late-diagnosed autistic adults in Australia. We interviewed 26 autistic adults about their life history and the impact of late diagnosis. All were diagnosed after the age of 35, growing up in an era when autism was not well known. Using reflexive thematic analysis, we uncovered a rich body of reflections on shared Autistic identity and identified three major themes within that data set: 'conceptualising the Autistic family', 'creating Autistic community', and 'contesting Autistic identity'. Overall, the study provides insights into the active creation of shared Autistic identity and the importance of Autistic community to these late-diagnosed autistic adults.
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Transtorno do Espectro Autista , Transtorno Autístico , Adulto , Humanos , Austrália , Diagnóstico TardioRESUMO
Effective parent-teacher partnerships improve outcomes for autistic students. Yet, we know little about what effective partnerships look like for parents of autistic children from different backgrounds. We conducted interviews with 17 Chinese parents of autistic children attending Australian kindergartens/schools to understand their experiences. Parents appreciated the acceptance, opportunities and supports they received in Australia. They had high expectations of children; expectations not often shared by educators. Parents were respectful of teachers' expertise and polite and undemanding in interactions. Nevertheless, parents were frustrated by inconsistent teaching quality and inadequate communication. Navigating systems was also challenging and parents faced discrimination from teachers and their community. Recommendations include fostering open home-school communication, proactively seeking parents' expertise about children and explicitly scaffolding parents' self-advocacy.
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Transtorno do Espectro Autista , Transtorno Autístico , Humanos , Criança , População do Leste Asiático , Austrália , PaisRESUMO
LAY ABSTRACT: Good relationships between parents and schools can improve autistic children's school success. There are many reasons why families from different cultural backgrounds find it harder to develop good relationships with schools, such as language barriers, discrimination and unfamiliarity with education systems. We know little about what 'good relationships' look like for these families. Here, we worked with a team of autistic and non-autistic researchers as well as an Advisory Group of Somali parents to conduct interviews with 15 Somali mothers of kindergarten and school-age autistic children. We asked mothers about their experiences of their child's education, communication with teachers and what a good relationship with schools would look like. We also asked how they felt the Somali community understood autism. We looked for common things that mothers said. We found that mothers were very proud of their children. They had high expectations, particularly about what children could do by themselves. Mothers found it frustrating that teachers had low expectations, that schools were not good at communicating with them and that autism-specific skills and experience were uncommon in schools. They also reported racist attitudes towards their children. Mothers experienced stigma and lacked resources, but support was gained from their daughters and their religion. Mothers themselves were proactively increasing community awareness and knowledge about autism in the hope that they and their autistic children would be valued and better supported. Our work has implications for how teachers and schools can work together with Somali parents to forge better futures for autistic children.
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Transtorno do Espectro Autista , Transtorno Autístico , Feminino , Criança , Humanos , Mães , Somália , PaisRESUMO
Background and aims: Participatory research involves academic partners working together with the community that is affected by research to make decisions about that research. Such approaches often result in research that is more respectful of, and responsive to, community preferences - and is vital in the context of autism research with culturally and linguistically diverse (CALD) communities. Whilst participatory approaches are becoming more commonplace within CALD autism research, no studies have explored the experiences of being involved in autism research from the perspectives of CALD community partners over the course of a study. This paper intended to address this gap by reporting on the experiences of CALD parents of autistic children who were community partners in a 1-year Australian research project exploring home-school partnerships for CALD parents of autistic children. We aimed to: (1) report on how parents' involvement in the research process shaped the home-school partnerships study over time and (2) understand their experiences of being community partners on the home-school partnerships project. Methods: Using key principles of participatory approaches, we established Chinese and Vietnamese parent advisory groups to contribute to a project exploring home-school partnerships for parents of autistic children from CALD backgrounds in Australia. Advisory groups included parents of autistic children from Chinese/Vietnamese backgrounds, as well as interpreters, professionals and researchers. We documented how parents' participation as community partners shaped the home-school partnerships study over the course of the project. We also elicited parents' own views and experiences of being community partners through informal, open-ended questions at the beginning and end of the study. Results: We found that parents' input fundamentally shaped the broader home-school partnership study, from meaningful, accurate translation of interview schedules through to making decisions regarding community-specific recommendations and dissemination plans. Parents themselves reported being keen to collaborate and to hear and share opinions for the purpose of the home-school partnership study - although they noted how emotionally difficult sharing their stories could be. While they initially had some concerns about combining being involved as a community partner with their existing responsibilities, ultimately, parents were surprised by the scope of the home-school partnership study and their level of involvement as community partners. Through hearing others' stories and sharing their own in advisory group meetings, parents reported ancillary benefits of their involvement, including increased self-advocacy and well-being. Conclusions: These findings show how research that is conducted in partnership with diverse members of the autism community has the capacity to improve the quality of the research and benefit community partners. Implications: This study clearly documents the benefits and potential challenges of participatory approaches with CALD communities. These findings emphasise to researchers and funders the importance of including extra time and money within budgets in order to produce meaningful research that is respectful and responsive to communities.
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Introduction: Autistic advocates and their supporters have long argued that conventional research practices provide too few opportunities for genuine engagement with autistic people, contributing to social disenfranchisement among autistic people. We recently described one attempt to develop and implement a participatory study in which a team of autistic and nonautistic researchers worked together to gather life histories from late-diagnosed autistic people. In the current study, we sought to understand the impact of this participatory approach on the participants themselves. Methods: We spoke to 25 Australian late-diagnosed autistic adults (aged 45-72 years), who had been interviewed by an autistic researcher using an oral history approach. We asked them about their experience of being involved in that project and the research process more broadly. We thematically analyzed participants' interviews. Results: Participants responded overwhelmingly positively to the opportunity to tell their life history, considering it illuminating and empowering. While recounting their life history was often described as "exhausting" and "draining," participants also reported feeling "supported all the way" and agreed "it was made easier because I had an autistic researcher interviewing me." One participant went so far as to say that they "probably would have dropped out [of the project] if it was run by people who weren't autistic." Conclusions: These findings demonstrate that the benefits of coproduction to researchers and community partners extend to study participants and to the quality of the research itself. Involving autistic partners in the research process, especially in its implementation, can play a crucial role in enhancing autism research.
Why is this an important issue?: Autistic people are often left out of decisions that affect them, including in research. We wanted to change that. We, a group of autistic and nonautistic researchers, worked together to come up with a research project. In that project, we wanted to know more about autistic people who were diagnosed late in their lives. What was the purpose of this study?: We wanted to know about their experiences of taking part in the research. We also wanted to understand what it was like for our study participants to tell their life story to another autistic person. What did we do?: We spoke to 25 autistic people about their experiences of telling their life history. We asked questions like, "Can you tell me a bit about why you wanted to share your life history?" and "What was your overall experience of taking part in this research project?" We interviewed participants for about 25 minutes. What were the results of the study?: We found that participants felt good about taking part in this project. They felt supported and were pleased that the project was being run by autistic people. They also told us that telling their story was often painful. However, it was made easier because they had an autistic researcher interviewing them. They also felt that they could share more with this person than with someone who was not an autistic person. What do these findings add to what was already known?: This study shows that research that is done together by autistic and nonautistic researchers has a positive effect on participants. What are the potential weaknesses in the study?: Most of our participants were well educated, White, and were in some form of work. We do not know if participants' positive experiences would also happen with other autistic people, including those from different cultural groups. This study was also unusual because it allowed participants to tell their own stories in their own way. That might have made participants more positive about it. How will these findings help autistic adults now or in the future?: These findings show how important it is to include autistic people in research. It makes a real difference to the participants and to the quality of the research.
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There is little comprehensive research into autistic adulthood, and even less into the services and supports that are most likely to foster flourishing adult autistic lives. This limited research is partly because autism is largely conceived as a condition of childhood, but this focus of research has also resulted from the orthodox scientific approach to autism, which conceptualizes autistic experience almost entirely as a series of biologically derived functional deficits. Approaching autism in this way severely limits what is known about this neurodevelopmental difference, how research is conducted and the services and supports available. In this Review, we adopt an alternative research strategy: we apply Martha Nussbaum's capabilities approach, which focuses on ten core elements of a thriving human life, to research on autistic adulthood. In doing so, we identify areas where autistic adults thrive and where they often struggle, and highlight issues to which researchers, clinicians and policymakers should respond. The resulting picture is far more complex than conventional accounts of autism imply. It also reveals the importance of engaging autistic adults directly in the research process to make progress towards genuinely knowing autism and supporting flourishing autistic lives.
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LAY ABSTRACT: Using oral history methods, we interviewed and recorded 26 autistic adults in Australia about their life history. We wanted to better understand interviewees' self-reflections about their lives. The interviewers were autistic researchers and the interviews were analysed by autistic and non-autistic researchers. All of the adults we interviewed were born before 1975 and formally identified as autistic after age 35 years. This group of people is sometimes referred to as 'late-diagnosed autistic adults'. In general, there is not much research done about autistic adults and even less is known about those diagnosed late in life. In this article, we explore what these adults said about their sense of self and how that changed over time. These autistic adults told us about many negative experiences, including trauma, which had shaped how they think about themselves. For most, autism diagnosis had a very positive impact on their sense of self, allowing them to understand more about their own past and to feel good about their autistic identity. Previously some researchers have said that autistic people have a limited or impaired sense of self. Instead, our results show some autistic people can actually reflect deeply on their lives and their changing sense of self-identity over time.
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Transtorno do Espectro Autista , Transtorno Autístico , Adulto , Austrália , Transtorno Autístico/diagnóstico , Emoções , HumanosRESUMO
INTRODUCTION: Receiving a diagnosis of autism in adulthood is increasingly common for a subset of individuals who were either misdiagnosed in childhood or missed out on a diagnosis altogether. This qualitative study, coproduced with autistic people, invites late-diagnosed autistic adults to share their life histories to (1) understand better the consequences of living without a diagnosis, (2) elucidate what precipitates an autism diagnosis in mid-to-late adulthood and (3) identify the perceived impact of receiving that diagnosis. METHODS AND ANALYSIS: Oral histories have been a successful way to uncover overlooked and marginalised voices. We therefore adopt qualitative, oral history methodology in this study to understand these adults' experiences, especially of living in an era when autism was not well known. We will recruit 24 participants who will (1) have been born before 1975, (2) have received a clinical, autism diagnosis after the age of 35, (3) be English-speaking and (4) have spent most of their childhood and adulthood living in Australia. Participants will take part in four sessions, including the main, qualitative, oral history interview, through a range of possible formats to facilitate inclusion. The interview data will be analysed using reflexive thematic analysis. ETHICS AND DISSEMINATION: The protocol has received institutional research ethics approval from Macquarie University's Human Research Ethics Committee (Ref.: 52019556310562). This study will yield understanding of the life experiences of autistic adults, especially middle-aged and older Australians, should inform more effective diagnostic practices and provide insight into the key factors that might promote resilience and enhance quality of life in autistic people. The findings will be disseminated to academic and clinical audiences through journal articles and conference presentations and to the autistic and autism communities through accessible reports. The interviews will also be prepared for digital archiving, which will enable ongoing access for future generations and communities.
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Transtorno Autístico , Adulto , Idoso , Austrália/epidemiologia , Transtorno Autístico/diagnóstico , Humanos , Estudos Longitudinais , Pessoa de Meia-Idade , Pesquisa Qualitativa , Qualidade de VidaRESUMO
Manganese enhanced magnetic resonance imaging (MEMRI) has been previously used to determine the effect of acute cocaine on calcium-dependent synaptic activity in male rats. However, there have been no MEMRI studies examining sex differences in the functional neural circuits affected by repeated cocaine. In the present study, we used MEMRI to investigate the effects of repeated cocaine on brain activation in female and male rats. Adult female and male rats were scanned at 4.7 Tesla three days after final treatment with saline, a single cocaine injection (15 mg kg-1, i.p. × 1 day) or repeated cocaine injections (15 mg kg-1, i.p. × 10 days). A day before imaging rats were provided with an i.p. injection of manganese chloride (70 mg kg-1). Cocaine produced effects on MEMRI activity that were dependent on sex. In females, we observed that a single cocaine injection reduced MEMRI activity in hippocampal CA3, ventral tegmental area (VTA), and median Raphé, whereas repeated cocaine increased MEMRI activity in dentate gyrus and interpeduncular nucleus. In males, repeated cocaine reduced MEMRI activity in VTA. Overall, it appeared that female rats showed a general trend towards increase MEMRI activity with single cocaine and reduced activity with repeated exposure, while male rats showed a trend towards opposite effects. Our results provide evidence for sex differences in the in vivo neural response to cocaine, which involves primarily hippocampal, amygdala and midbrain areas.
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Cocaína/administração & dosagem , Inibidores da Captação de Dopamina/administração & dosagem , Memória/efeitos dos fármacos , Mesencéfalo/efeitos dos fármacos , Caracteres Sexuais , Animais , Cloretos , Meios de Contraste , Esquema de Medicação , Feminino , Imageamento por Ressonância Magnética , Masculino , Compostos de Manganês , Memória/fisiologia , Mesencéfalo/diagnóstico por imagem , Mesencéfalo/fisiologia , Atividade Motora/efeitos dos fármacos , Atividade Motora/fisiologia , Ratos Long-Evans , Comportamento Estereotipado/efeitos dos fármacos , Comportamento Estereotipado/fisiologiaRESUMO
BACKGROUND: Tauopathies are characterized by intracellular deposition of the microtubule-associated protein tau as filamentous aggregates. The rTg4510 mouse conditionally expresses mutant human tau protein in various forebrain areas under the Tet-off expression system. Mice develop neurofibrillary tangles, with significant neuronal loss and cognitive deficits by 6 months of age. Previous behavioral and biochemical work has linked the expression and aggregates of mutant tau to functional impairments. The present work used manganese-enhanced magnetic resonance imaging (MEMRI) to investigate basal levels of brain activity in the rTg4510 and control mice. RESULTS: Our results show an unmistakable curtailment of neural activity in the amygdala and hippocampus, two regions known for their role in memory formation, but not the cortex, cerebellum, striatum and hypothalamus in tau expressing mice. CONCLUSION: Behavioral impairments associated with changes in activity in these areas may correspond to age progressive mutant tau(P301L)-induced neurodegeneration.