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Empire of Normality
'Groundbreaking … [provides] a deep history of the invention of the \"normal\" mind as one of the most damaging and oppressive tools of capitalism. To read it is to see the world more clearly' Steve Silberman, author of NeuroTribes
'Argues that a radical politics of neurodiversity is necessary, not only for neurodivergent folk, but for our collective liberation' Professor Hel Spandler, editor, Asylum magazine
'A vital book that kindles the flames of a neurodivergent revolution' Beatrice Adler-Bolton, co-author of Health Communism
Neurodiversity is on the rise. Awareness and diagnoses have exploded in recent years, but we are still missing a wider understanding of how we got here and why. Beyond simplistic narratives of normativity and difference, this groundbreaking book exposes the very myth of the 'normal' brain as a product of intensified capitalism.
Exploring the rich histories of the neurodiversity and disability movements, Robert Chapman shows how the rise of capitalism created an 'empire of normality' that transformed our understanding of the body into that of a productivity machine. Neurodivergent liberation is possible – but only by challenging the deepest logics of capitalism. Empire of Normality is an essential guide to understanding the systems that shape our bodies, minds and deepest selves – and how we can undo them.
Robert Chapman is a neurodivergent philosopher who has taught at King's College London and Bristol University. They are currently Assistant Professor in Critical Neurodiversity Studies at Durham University. They blog at Psychology Today and at Critical Neurodiversity.
eBook
The minority body : a theory of disability
Elizabeth Barnes argues compellingly that disability is primarily a social phenomenon- a way of being a minority, a way of facing social oppression, but not a way of being inherently or intrinsically worse off. This is how disability is understood in the Disability Rights and Disability Pride movements; but there is a massive disconnect with the way disability is typically viewed within analytic philosophy. The idea that disability is not inherently bad or sub-optimal is one that many philosophers treat with open skepticism, and sometimes even with scorn. The goal of this book is to articulate and defend a version of the view of disability that is common in the Disability Rights movement.
Book
Dropout intent of students with disabilities
We examine the mechanisms explaining the dropout intentions of students with disabilities by integrating Tinto's model of student integration, the student attrition model, the composite persistence model, and insights from social stratification research. The resulting theoretical model posits that not only students' academic and social integration, but also their private resources (financial, home learning, and personal resources) are crucial for academic success. Analysing data from a 2020 Germany-wide student survey, we find that students with disabilities are substantially more likely to intend to drop out of higher education than students without disabilities. Linear regressions and Kitagawa-Oaxaca-Blinder decompositions show that their lower academic integration and fewer personal resources are most relevant for explaining this difference, while their lower social integration, home learning, and financial resources play subordinate roles. Further analyses reveal that dropout intent is highest among students with psychic disabilities, followed by students with learning disabilities and students with physical disabilities. Regarding all three disability groups, less academic integration and fewer personal resources are most relevant for explaining their higher dropout intent (compared to students without disabilities). However, the disability groups differ regarding the importance of the different explanatory factors. Overall, our results highlight the importance of considering both students' integration into higher education and their private resources for understanding student-group-specific dropout intent.
Journal Article
Functional aspects of meningeal lymphatics in ageing and Alzheimer’s disease
Ageing is a major risk factor for many neurological pathologies, but its mechanisms remain unclear. Unlike other tissues, the parenchyma of the central nervous system (CNS) lacks lymphatic vasculature and waste products are removed partly through a paravascular route. (Re)discovery and characterization of meningeal lymphatic vessels has prompted an assessment of their role in waste clearance from the CNS. Here we show that meningeal lymphatic vessels drain macromolecules from the CNS (cerebrospinal and interstitial fluids) into the cervical lymph nodes in mice. Impairment of meningeal lymphatic function slows paravascular influx of macromolecules into the brain and efflux of macromolecules from the interstitial fluid, and induces cognitive impairment in mice. Treatment of aged mice with vascular endothelial growth factor C enhances meningeal lymphatic drainage of macromolecules from the cerebrospinal fluid, improving brain perfusion and learning and memory performance. Disruption of meningeal lymphatic vessels in transgenic mouse models of Alzheimer’s disease promotes amyloid-β deposition in the meninges, which resembles human meningeal pathology, and aggravates parenchymal amyloid-β accumulation. Meningeal lymphatic dysfunction may be an aggravating factor in Alzheimer’s disease pathology and in age-associated cognitive decline. Thus, augmentation of meningeal lymphatic function might be a promising therapeutic target for preventing or delaying age-associated neurological diseases.
Meningeal lymphatic dysfunction promotes amyloid-β deposition in the meninges and worsens brain amyloid-β pathology, acting as an aggravating factor in Alzheimer’s disease and in age-associated cognitive decline; improving meningeal lymphatic function could help to prevent or delay age-associated neurological diseases.
Journal Article
Neuroinflammation induced by lipopolysaccharide causes cognitive impairment in mice
In this study, we investigated lipopolysaccharide (LPS)-induced cognitive impairment and neuroinflammation in C57BL/6J mice by using behavioral tests, immunofluorescence, enzyme-linked immunosorbent assay (ELISA) and Western blot. We found that LPS treatment leads to sickness behavior and cognitive impairment in mice as shown in the Morris water maze and passive avoidance test, and these effects were accompanied by microglia activation (labeled by ionized calcium binding adaptor molecule-1, IBA-1) and neuronal cell loss (labeled by microtubule-associated protein 2, MAP-2) in the hippocampus. The levels of interleukin-4 (IL-4) and interleukin-10 (IL-10) in the serum and brain homogenates were reduced by the LPS treatment, while the levels of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), prostaglandin E2 (PGE
2
) and nitric oxide (NO) were increased. In addition, LPS promoted the expression of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) in the brain homogenates. The Western blot analysis showed that the nuclear factor kappa B (NF-κB) signaling pathway was activated in the LPS groups. Furthermore, VIPER, which is a TLR-4-specific inhibitory peptide, prevented the LPS-induced neuroinflammation and cognitive impairment. These data suggest that LPS induced cognitive impairment and neuroinflammation via microglia activation by activating the NF-kB signaling pathway; furthermore, we compared the time points, doses, methods and outcomes of LPS administration between intraperitoneal and intracerebroventricular injections of LPS in LPS-induced neuroinflammation and cognitive impairment, and these data may provide additional insight for researchers performing neuroinflammation research.
Journal Article
The use of commercial computerised cognitive games in older adults: a meta-analysis
Brain training programs are currently one effective solution to prevent cognitive decline in healthy aging. We conducted a meta-analysis of randomized controlled trials assessing the use of commercially available computerised cognitive games to improve cognitive function in people aged above 60 years old without cognitive impairment. 1,543 participants from sixteen studies were included in the meta-analysis. Statistically significant improvements were observed for processing speed (SMD increased 0.40 [95% CI 0.20–0.60], p < 0.001), working memory (0.21 [95% CI 0.08–0.34], p = 0.001), executive function (0.21 [95% CI 0.06–0.35], p = 0.006), and for verbal memory (0.12 [95% CI 0.01–0.24, p = 0.031), but not for attention or visuospatial abilities. No relationship between the age of the participants and the amount of training was found. Commercially available computerised cognitive games are effective in improving cognitive function in participants without cognitive impairment aged over 60 years.
Journal Article
Novel Method for Rapid Assessment of Cognitive Impairment Using High-Performance Eye-Tracking Technology
A rapid increase in the number of patients with dementia has emerged as a global health challenge. Accumulating evidence suggests that early diagnosis and timely intervention can delay cognitive decline. The diagnosis of dementia is commonly performed using neuropsychological tests, such as the Mini-Mental State Examination (MMSE), administered by trained examiners. While these traditional neuropsychological tests are valid and reliable, they are neither simple nor sufficiently short as routine screening tools for dementia. Here, we developed a brief cognitive assessment utilizing an eye-tracking technology. The subject views a series of short (178 s) task movies and pictures displayed on a monitor while their gaze points are recorded by the eye-tracking device, and the cognitive scores are determined from the gaze plots data. The cognitive scores were measured by both an eye tracking-based assessment and neuropsychological tests in 80 participants, including 27 cognitively healthy controls (HC), 26 patients with mild cognitive impairment (MCI), and 27 patients with dementia. The eye tracking-based cognitive scores correlated well with the scores from the neuropsychological tests, and they showed a good diagnostic performance in detecting patients with MCI and dementia. Rapid cognitive assessment using eye-tracking technology can enable quantitative scoring and the sensitive detection of cognitive impairment.
Journal Article
Neuroadaptive technology enables implicit cursor control based on medial prefrontal cortex activity
The effectiveness of today’s human–machine interaction is limited by a communication bottleneck as operators are required to translate high-level concepts into a machine-mandated sequence of instructions. In contrast, we demonstrate effective, goal-oriented control of a computer system without any form of explicit communication from the human operator. Instead, the system generated the necessary input itself, based on real-time analysis of brain activity. Specific brain responses were evoked by violating the operators’ expectations to varying degrees. The evoked brain activity demonstrated detectable differences reflecting congruency with or deviations from the operators’ expectations. Real-time analysis of this activity was used to build a user model of those expectations, thus representing the optimal (expected) state as perceived by the operator. Based on this model, which was continuously updated, the computer automatically adapted itself to the expectations of its operator. Further analyses showed this evoked activity to originate from the medial prefrontal cortex and to exhibit a linear correspondence to the degree of expectation violation. These findings extend our understanding of human predictive coding and provide evidence that the information used to generate the user model is task-specific and reflects goal congruency. This paper demonstrates a form of interaction without any explicit input by the operator, enabling computer systems to become neuroadaptive, that is, to automatically adapt to specific aspects of their operator’s mindset. Neuroadaptive technology significantly widens the communication bottleneck and has the potential to fundamentally change the way we interact with technology.
Journal Article
Introducing the tablet-based Oxford Cognitive Screen-Plus (OCS-Plus) as an assessment tool for subtle cognitive impairments
Here, we present the Oxford Cognitive Screen-Plus, a computerised tablet-based screen designed to briefly assess domain-general cognition and provide more fine-grained measures of memory and executive function. The OCS-Plus was designed to sensitively screen for cognitive impairments and provide a differentiation between memory and executive deficits. The OCS-Plus contains 10 subtasks and requires on average 24 min to complete. In this study, 320 neurologically healthy ageing participants (age
M
= 62.66
,
SD = 13.75) from three sites completed the OCS-Plus. The convergent validity of this assessment was established in comparison to the ACE-R, CERAD and Rey–Osterrieth. Divergent validity was established through comparison with the BDI and tests measuring divergent cognitive domains. Internal consistency of each subtask was evaluated, and test–retest reliability was determined. We established the normative impairment cut-offs for each of the subtasks. Predicted convergent and divergent validity was found, high internal consistency for most measures was also found with the exception of restricted range tasks, as well as strong test–retest reliability, which provided evidence of test stability. Further research demonstrating the use and validity of the OCS-Plus in various clinical populations is required. The OCS-Plus is presented as a standardised cognitive assessment tool, normed and validated in a sample of neurologically healthy participants. The OCS-Plus will be available as an Android App and provides an automated report of domain-general cognitive impairments in executive attention and memory.
Journal Article